I'm starting to see more of where pople notin favor of advanced techs are coming from, if they're in the game most people feel forced to learn them in order to do well even in friendlies. They don't like needing to know how to L-cancel to make bowser and the other slower characters more viable, they don't want to learn to wavedash to get the most out of mewtwo or luigi. What tends to happen even in casual groups, is one person ends up learning a tech one way or the other, then everyone else has to learn it on order to not get trashed in friendlies.
I understand both sides, but I think melee ended up being WAY too focused on the adv. techs. Someone said it before, something like "oh no, they can wavedash, I lose" being sarcastic, but really for casual players that's how it is. They don't want to be pushed to learn these things to keep up with the poeple in their smash groups who learn them. If the techs were BALANCED then it woulden't matter, they would just be extra tools, like another sideb move or a slightly better recovery.
Compromise seems to be the answer, and I think that's what brawl will do.