Let me say that if I had to choose which Smash Bros. to play with a group of friends, it would definitely be Brawl, but at the same time SUPER is right in almost every point he makes about the game.
If you can't see that Brawl is poorly balanced I'm not sure we're playing the same game. The tripping, however infrequent, adds nothing to the game besides randomness for the sake of randomness, and should at least have the option of being turned off. Final smashes are a cool idea, but are ridiculously, and I mean ridiculously, unbalanced.
I think Sakurai's got great ideas, but doesn't always execute them well. I think working with the Tekken team for this next game is going to do wonders for its competitive balance, while still retaining the creativity and fun Sakurai brings to the table.