For starters, Metaknight can't be compared to King Dedede's infinite because King Dedede's infinite can be counterpicked around. All the gay elements in Brawl can be counterpicked around except Metaknight. Chaingrabs, infinites, camping, jab locks, etc can be avoided by picking certain characters and stages or at least made less effective.
The effectiveness of counterpicking characters in mid to high levels of play is slim, as I've demonstrated multiple times in this thread.
How many times do you counterpick characters in tournament? Scarcely. And when people do it, it's not to really put themselves in a larger advantage against the opponent's character, but to survive a horrible match-up for their character. As a Diddy, you won't be likely to counterpick against a Wario and use Marth. As a Fox, you'll be more likely to counterpick against a Pikachu and use Marth. The former is a very winnable match-up, the latter isn't as much.
Talk of MK needing a disadvantageous match-up seems very overrated at this point, given that most players stomach through other 45:55, 4:6, and 35:65 match-ups as long as they aren't going to get completely demolished. How many people would honestly start counterpicking MK's slight advantage if he got one? Probably not many. MK mains would know the match-up like no other, and nobody would get away with counterpicking as him except a devoted main of that character.
Counterpicking characters is hardly used at mid-levels of play, and is especially not used at high levels of play (good luck CPing CO18 with your 2 week Falco instead of your 6 month main).
Second, the way things are now IS the community's fault. As I said several times before, Metaknight became a bandwagon character after he overtook Snake, I believe, last June. Instead of sticking to their own characters, many people simply switched to Metaknight and, all in all, who could blame them when you put into consideration 1. all the things I listed about Metaknight earlier and 2. the nature of Brawl that gives you very few options for countering such things. In a sense, it has comeback and bitten us in the butt which is why this issue has come up four times.
It wasn't forced. Refer to my other post.
You say he became a bandwagon character. Not because he forced people to switch to him, not because he was twice as viable as Snake or any other character could ever be, but because people just switched to him. Bandwagon effect says hi. It was not forced, it just happened.
Third, think about Brawl's history. How many big and practical discoveries have been made since Brawl has come out? Maybe two. Brawl is a game that grew very fast when it first came out but now only a few characters are still genuinelly improving while more characters are becoming worse like King Dedede and Mr. Game and Watch or have been borderline abandoned like Pit and Lucario. The closest thing that the Smash community has ever had to Metaknight is Shiek back in 2002/2003 and, with a community less than half the size it is now, were able to find a way to knock Shiek down a peg in less than a year with the major discovery of shield grabbing. Now, about a year and two months have passed since Metaknight became dominant and virtually's nothing changed aside from the lead in front of Snake shortening by a little bit. Metaknight's still ahead of Snake by a longshot who in turn is in front of the rest of the cast. Snake is the only "pseudo" counter who has stayed close to Metaknight. Diddy Kong has had patterns of rising and falling, ZSS is currently falling, and the Ice Climbers are currently rising. If people think something big is magically going to be discovered that knocks Metaknight down a peg, then they are nuts. Finding new, pracitical, and game changing things in Brawl is like looking for water in a sandbox and, in this state, the community has doomed the game to fail.
Alright, so...
The gap in tournament results and the match-up between MK and Snake are both diminishing.
The match-up between MK and Diddy Kong has been steadily going more against MKs favor (there are also known techs such as instant throwing and single banana locking that aren't often used at the top of Diddy's meta-game and can be incorporated a lot more into).
The match-up between MK and Ice Climbers, I believe, has been steadily going more against MKs favor.
We're not looking for some, "hax tech like l-cancelling that won't work for MK and then everything will change!!!1." But there's obvious steady improvement against MK for these few characters, and his tournament results have been steadily slipping. With no evidence to suggest it will go the other way, I don't see the logic in saying, "Well why wait because nothing huge will happen."
Fourth, people need to stop comparing the Brawl community to other fighting game communities. It is easier to make comparisons between Brawl to Mario Kart then to Street Fighter. I'm sorry, it had to be said but most of us already know this and will always be one of the grivences that the people who played Melee or other "serious" fighting games competitively will have. It's like comparing a house cat to a tiger, there are similarities but the differences are more than obvious. To act accordingly on this issue, we need to stop looking at other communities because WE ARE NOT THEM AND WE WILL NEVER BE THEM. Brawl will never be a completely serious competitive game so we might as well cut our loses to make this game last longer.
Most of the comparisons between Brawl and other fighting games are purely match-up/tournament dominance-wise. When some compare MK to Sagat in SFIV or Fox in Melee, they aren't comparing the actual characters. They're comparing how they have similar match-ups against the rest of the cast and are unique in the aspect, yet the other respective fighting games still have healthy communities and metagames.
The comparison isn't, "MK is like Sagat and Sagat isn't banned so don't ban MK!" The comparison is, "MK is like Sagat. They're both clearly the best in their respective fighting games, but the SFIV metagame is healthy. It shows that a character like MK can still keep the metagame thriving, therefore there isn't a reason to ban MK."
Fifth, are you concerned what the other communities would say if we did ban Metaknight? Really, who cares? As I already mentioned, there's no sense in trying to be them and using other communities standards to a T. People already heavily look down on the Brawl community as it is so do you think things will drastically change if we follow their standards for banning things to appease the people who play SFIV and couldn't care less about what we do? We already have for everything else so we can say that we save face on at least that issue. The slippery slope arguement has already been cast aside by many essteemed members of this community because, surprise, surprise, the Brawl community is by no means stupid but we have made some stupid decisions in the past.
This is a little more direct than number 4, but you're still taking it too straight on.
It's not so much of, "SF players will laugh at us for banning MK since it'd be stupid to them," (although that is what some people are saying). It's more of, "SF players wouldn't even have the thought to ban MK if he was in their game."
Still, it isn't an issue what other fighting games think of our game. We do whatever we think is best for our game. I obviously don't think banning MK is best for our game, though.
In the end, as fans of this game, it should be our responsibility to keep this game alive by keeping it interesting as the game struggles on its own to do it itself.
uhhh
"Quick, let's make the game fun! Banning MK will make everything fun, and there will be no top character, and--"
Is what that sounds like.
You don't alter a game to make it more interesting. Honestly, I don't see how banning MK makes the game more interesting. Less MKs. If you don't like watching MKs play, great. If you like watching MKs play, aww. It's subjective and varies from person to person. There is no universal rule that says, "MK is boring, and seeing an MK place well is boring."
I also don't see how the game struggles to be alive at this point. It's doing fine. Not only is it not struggling, but I don't understand how banning MK would fix the, "problem."