Okay, it's these sorts of reasons why "tiers are for queers" is such a popular phrase amongst casual players.
Smash is for fun, right? This is something everyone can agree on, no matter how they play Smash. If someone enjoys playing tournaments, who are we to say (or anyone, for that matter) they can take Metaknight and play him competitively. No ones saying you can't play Metaknight. I personally would prefer that everyone play Metaknight and have fun than everyone playing different characters and bawwing at thefew that do about him being banned. : /
Secondly, Metaknight may be flying ahead of the rest of the cast, but according to Ankoku's thread in Tactical Discussion (which can't be perfectly accurate, agreed, but it'll do for this point) Metaknights aren't winning the majority of tournaments. >_> I can understand if MK was winning about 50% ofall tournaments, but according to the aforementioned thread MK is winning around 15 (that's rounded up, guys) percent of tournaments. As long as that number stas below... 35%, I'd say MK should not be banned.
Lastly... there's still time for other metagames to improve (back in melee was it called foxgames? *weak applause*) and Metaknight counter to come forth.
~Mottsy~