I agree with Takeshi245 and Pr0g. What's wrong with beeing a professional gamer? If you are a professional gamer, more power to you! You're making money doing something you love to do, and as far as I'm concerned, that's success in life, not a problem with it.
As far as the thread topic is conerned, the reason I would like wavedashing to return is because I never played SSB64. The only Smash Bros game I played extensively has wavedashing, so now I'm more or less dependant on it. I can't imagine having to ground-cancel shines instead of jump canceling them.
That's not to say I don't want shffling/powershielding/DJCing/etc not to return. The one thing I DO want to return over anything else (even wavedashing) is DI. I think the way DI works in SSBM is absolutely ingenious, and gives Melee a huge extra dimention of depth to it. Watch the "mindgames combo" video on youtube, the first clip between Ganon and Marth, to see how deep SSBM gets thanks to DI.
Removing DI would be silly, since there's absolutely no con to having it; just a ton of pros (no pun intended). Casual players don't have to use it. In fact, they can be completely oblivious to it and still play and love the game. However, players who like to go deeper into the game can use it to escape combos and survive longer. Nobody loses out (except perhaps the casual player dying at 90% to fsmashes, playing against a more compeditive gamer who's surviving at 130%).