Melee's pretty sucky anyway. I went and played it for some time a couple of days ago between Brawling and man. Everything's so weak. The attacks are weak. The people are weak to them. Everybody sucks. It feels borken.
But I miss Mewtwo (who didn't even get a real replacement), Pichu (and his Brawl trophy looks awful... so does Mewtwo's), Dr. Mario (Pills! More of them!!), and to a lesser extent Roy (whom I hardly know). But I guess they had to go. That'd be too many Pokémon and I'd rather have Red than Pichu... Dr. Mario should have been a costume for Mario. As far as I care, the Links just got updated. I miss OoT-based old Link more than I miss OoT-based young Link, Melee Zelda acted more like TP Zelda, and Ganondorf's new beard is good for snapshots that require bearded guys*.
*Brawl is the first Smash Bros. to feature bearded characters. I'm about to add this to the fun facts on the main page of the Smash Wiki.
Edit: Gah, I guess I can't do that. ._.