i think you harold are too "art of war" and the smash community is too "SF" , and that's my opinion...
yeah, the levels are a big part of learning the game, but during a competition, when your "score" for the round doesn't depend on the level being played, it makes a big difference...
for example, lets say someone _really_ likes skyworld... and I mean, they know _everything_ there is to know about this level, and their main characters playstyle was developed unintentionally to be amazing at that level (basically they just played that level over and over to learn how to play, so naturally the style would sut the level)
now we enter a tournament... this person is basically garunteed a round off of me (don't dismiss this as johns, it's a serious concern)... the problem is to be able to actually compete at that level, I would have to spend as much time learning about that specific level as the other person (or at least gain the same amount of knowledge about it), and with so many levels, that will be very hard to do...
enter a tournament, and all of a sudden everyone will have 2-3 levels which completely complement their character/style, so in order for a well rounded player to win, they have to beat someone who is very skilled at a 'neutral' level, then attempt to compete with them in their arena, and then attempt to win on a level of your choosing... unless you have 2-3 levels yourself (obviously one will get banned, and personally I prefer 2 bans each, but i'm getting off topic) you are going to be inherently at a disadvantage...
ie. the only way to be on equal competitive grounds with an opponent is to play a character that can severely take advantage of a group of levels...
currently, the "SF" approach is too far in the other direction... by banning all levels that 'get in the way' too many characters are at a disadvantage because the game was not designed with this in mind... a very select subset of characters get advantages, while the rest do not get hindered...
a balance needs to be struck... just saying "because I can't break it, it should be legal" really is as closed minded as "I don't like it and therefore it should be banned"... remember, we've already decided to modify the core game via the exclusion of items, the implementation of a stock-time standard, and even special rules governing who actually won the match (the games core allows for a tie, we do not)... the goal is to create the best competitive environment (wow i sound like a broken record sometimes), and to me, that would be to balance the "art of war" and "street fighter" styles so that both are equally valid approaches to competitive play, and neither would significantly have an advantage over the other