I don't see the issue there.
One of the specials is buffed/nerfed because of a patch ? Change the sets.
We somehow find out that Mii Brawler is definitely broken and have to ban one of his moves ? Change the sets.
The meta shifts too far away from the existing sets and some options become clearly better ? Change the sets.
Everything would be possible IF there was an initiative from the Mii players to publish something easy to set up and comprehend. But no all that has been done is repeat ad infinitum that the movesets can be used with customs off (there's even a GIMR video published repeating the exact same 3 arguments).
God fortbid the poor Mii players couldn't choose from their 81 different sets. Each.
Also : we're playing a game where the decision on the number of stocks (one of the most influential factors in the meta) hasn't been settled, the very existence of the FriiMii movement is to promote change and you guys worry that if you decide on a moveset it will NEVER EVER change ? Get real.
Aside for the fact that you completely ignored 3/4 of my post (and the most important points), you're still getting things wrong.
If you do not consider "special number 1" to be the default, then there is no default, thus any fixed set is arbitrary and unjustified.
"something easy to set up and comprehend" would be either going by the game or the MLG rules, not this organizational crap.
"81 different sets" is irrelevant since a) there are already 50+ characters in this game, and two different Miis have more in common than Mario and Doc, and b) this is a f*cking competition with money involved, someone else will learn if you are too lazy to do so.
And you only answered to the possibility to change the sets in the future, when this is clearly not the main issue (the fact that <1% of the players will decide something that will be copy-pasted all around the globe for everyone is a much bigger problem, for example).
Well for starters you can't switch movesets mid match so that "thing" is completely different from all your examples. And secondly the number of mii slots is limited to 99 per wii u so it is technically impossible to set up every single set for all 3 mii characters.
Rosaluma is the only duo character in the game, so that "thing" is completely different from all the others. Shulk is the only one who can alter his stats, so that "thing" is completely different from all the others. In Melee Zelda is the only one who can switch to a whole other character, so that "thing" is completely different from all the others. Etc.
See, it's easy going that way. Every "thing" is completely different from all the others, that was precisely wizrad's point. If it wasn't unique, it wouldn't be a "thing" in the first place. The question you keep avoiding is if/how/why that "thing" is actually problematic.
And you do not create every possible gamertag in advance either, you let each player create their own when they need it, and in the extreme and unrealistic case where you hit the limit, you can still delete some to make room. Quick and simple in both cases.
Next is this hypocritical implied argument that it is CRUCIAL for all Miis to be able to choose from their complete moveset in order to be usable in tournament. Let's be honest here and take the example of mii brawler : out of the 12 moves he has there are at least 6 that are too bad to be used or simply outclassed by another move in every way. If one wanted to play the character with winning in mind (remember that this is a tournament setting we're talking about, you can play all the Miis in the world in friendlies no one will blame you or call the referee) then I don't think they would want a down special that isn't the flip kick, or would pick the axe kick up B over the other two.
What is CRUCIAL for an out-of-game rule in a COMPETITIVE environment is to have a specific NEED to fulfill. If there is no NEED, there should be NO rule. It is those who want to add a restriction who have the burden of proof, not the opposite. Mii players precisely do not ask for anything, they would be happy to be left alone. Not only you (nor anybody else) still haven't explained why the free choice of moveset is ACTUALLY uncompetitive, but so far all the tournaments that used that rule (MLG, KTar, Shot Fired 2 etc) went fine. But feel free to ignore that paragraph once again.
The fact that "6 out of 12 moves are useless" is your personal arbitrary opinion, and is utterly irrelevant. It should not be a base for any rule, and certainly not such a large-scale one. Plus, locals, nationals and majors alike are most of the time won by the same handful of players, I doubt a lot of people come with "I'm gonna win" in mind but rather come for the hype, meeting people, simply playing the game etc. This is irrelevant anyway.
Well I don't know, ask the mii players why they aren't satisfied. Spoilers it's probably because they want complete freedom. Also what's the grudge against DLC for ? What does it have to do with anything ?
Dude, seriously ? Are you even trying ? You didn't read the whole 1/4 of my post where I talked about this. How are the MLG rules "complete freedom" compared to how the Miis work in-game with 0 additional limitation ? Mii players are ready to compromise and would be happy with the MLG rules, they want only one thing really, when all you give them is "your character is not banned, you should be happy lol" (and you know this is not an exaggeration if you followed the "debates" in the french FB group).