Brawl's completely new to us. As Plainrkk, said, the community will have to change it from party to competitive. I will admit, I didn't like Melee until I learned advanced techs because they changed the entire dimension of the game. you could know the techs, but unless you added a little flair, they were just another thing in the game. Wavedashing doesn't make someone 1337 after all.
I did not play pro players, so I'm not an absolute expert, but I had some interesting experiences with Melee. A couple of my friends and I used advanced techs and we came to the conclusion that it gave Melee versatility and uniqueness from some other fighters. At the same time, I had a friend who played Fox in a manner similar to Aniki playing Link. He didn't use advanced techs at all, but he was aggressive and knew his fox well enough to give us a challenge (that makes me mediocre, I guess >.<)
Right now, that same friend is better than me and a couple others by a little bit in Brawl because he doesn't worry about the techs. However, Brawl's new. I mean, I just got it on Sunday >,< and I suck. But, as time passes, the competitive side will grow and transform it. The same happened to Melee and 64.
Sakurai also gave us competitive people a chance to exercise our skill with the Item Switch option. We don't like items; turn 'em off. 'Nuff said.
Again, I was mediocre at best, so I'm not a complete expert. I kinda agree with Plairnkk though: Brawl (at this very moment) is a very limited game. We'll see what the community provides.