I'm mad that Brawl is in MLG (Major League Gaming) because Sakurai went out of his way to make that game uncompetitive, and now it's on the circuit for the best tournaments in the nation. With more money on the line, competitors will do whatever it takes to make top 16, which means more MetaKnight, more camping, more slow, and more boring. Brawl will probably last 1 year on the circuit until the heads at MLG realize that Brawl isn't doing them any good.
Brawl is a pretty fun game, and it has a pretty good amount of depth to it, despite what Sakurai tried to do. But the game doesn't have the right attributes for it to be considered a competitive game suited for MLG. Everyone knows the arguments for why Brawl isn't considered a good competitive game, so I'm not going to waste more of my time bringing up the problems again.
However, I will say that one of the biggest problem for Brawl being on the MLG circuit is the type of exposure it will receive from other gaming communities. Since Brawl will be hosted in the same venue along with other games such as Halo 3 and Tekken 6, those gaming communities will get to see competitive Brawl gameplay. Those gaming communities only know Brawl for the party game aspect, and when they see Brawl for the first time being played competitively, they're going to laugh. I'm not saying "they're going to laugh" because it's a party game, but because of how people play the game to win. They'll see the floaty slow pace, the camping, the chaingrabs, the planking, the scrouging, and all of that ****. It'll give a pretty bad rep for the smash community if this is what people see. It might also give MLG a bad rep for hosting a game considered uncompetitive to many, and also one that is boring to watch.
In the end though, the Brawl players won't care (not saying that as a negative statement). They get their money and their 15 minutes of "fame". Some good things can come from this, I must say. There will undoubtedly be a few curious people that will take interest in competitive Brawl, and a small percentage of those people will also drift over to Melee.