If asked on how they could improve Smash Bros., I'd again say the same thing, throw in more fighters. But in retrospect, for as awesome as the presentation is in Melee and Brawl, sometimes I long for the simple days of Super Smash Bros. Light-hearted intro, subtle menu music, actually seeing 3D models when selecting fighters (which I really miss from the later Smashes. There's always something about that little flourish a character does when being selected. Must be why I enjoyed playing as Yoshi early on because of that spin he does). The announcer might have been better too. The characters were laughable though - Donkey Kong didn't really look like himself.
But back to presentation, I remember seeing the intro for Smash Bros. Melee and thinking "wait... this is the ACTUAL intro to the game? Are you kidding? It's too awesome, why would Nintendo do this?" So I was happy to see that it was the actual intro, telling me that I could expect more fancy FMVs in the future.