Dude. We just want the game to be fair.
Look at Melee's earlier tier lists.
http://www.ssbwiki.com/List_of_SSBM_tier_lists_(NTSC)
Almost all of the top tier characters were up there since the very beginning. All characters that became top tier later on were pretty much never below half. That should say something. And this is back when we as a community didn't know nearly as much as we do now. Now that we know significantly more about Smash, It makes significantly easier to decide who is viable and who isn't.
You're right. The meta will never fully develop. Probably ever. Melee has been out for almost 15 years, and it's still changing.
Look dude, I know where you're coming from, but this isn't true at all. There's tons of people trying to evolve the meta of characters that are considered "lower tier". For example, there are really good players out there that are trying their damnedest to make Marth viable again. Chances are you've heard of Mrb. E. That guy has made some top players go to work, because of how well he plays Marth. He did a stellar job againts M2K at Apex, and even beat him in an online tourney.
I'm going to Evo this year. (Couldn't go to CEO for reasons, even though I live really close to where it was held.) It's my very first (inter)national level tournament. Guess who I'm playing? Marth. I'm playing Marth, dude. Marth is pretty much *** in this game, and everyone agrees. There's no way in the world that I would win Evo, let alone with Marth. However, I've put a ton of work into playing Marth, and I don't care who you are, you will have to work to beat me when I play Marth. It won't be a cakewalk, but it certainly won't be easy. Chances are you will beat me, but I'm not gonna go down easily because I'm playing Marth.
As I said before, there are lots of people trying new things, and trying to develop the meta. None of us are really getting anywhere, though.
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Moving on to your next post:
People may not have "mastered" any character, but people have gotten really good with them. Like, really good. Melee has been around for a long time, but has anyone truly "mastered" a character? The game is still changing. What constitutes a someone having "mastered" a character?
Easier, huh?... I don't think easy is the right word... Buffing a character does not make the entire game easier. Buffing a character makes them more viable for winning tournaments. We use the word "viable", and not "easy" because certain a character might be "easy" to one person, but "hard' to another, simply because those 2 people have different play styles. Why would you state that someone wants the
game to be easier.
When I read that, I read it in a stereotypical, cocky British accent. I've played as Marth and Lucina for well over 1000 hours combined on my Wii U. That means I've played them for literally a month and a half. That means if I were to sit down and play as either Marth or Lucina for a month and a half straight with no breaks whatsoever, that's how long I've played them. If that doesn't show an investment of time, practice, and dedication to "getting good", then I don't know what does. It's not hard to tell what characters need a few bufffs.