Well, for one, you do know Sakurai doesn't make the game alone, right?
Though, I would love for them to fix the travesty that is the normal Smash menu. A default ruleset would have been nice, but the way they have it set up is horribly inconvenient. Especially when pretty much every other game had this system down pat. For that matter, I prefer picking stages last.
Speaking of picking, I wish there was at least an option for a by series organization of stages and fighters. The music is sorted this way why can't we do that with the others? At the very least, I'd like to separate the echoes into their respective Smash games. Come on, if you're going to make it about Smash, at least have the decency not to lump a newcomer in with the original cast because the way they treat echoes makes even the Smash ordering incorrect. Not to mention, the Melee and Brawl fighter sections seem particularly egregious. Did Melee even have trickled out reveals? How did they decide who goes where? Plus, when most fighters from the same series can't even be next to each other despite both joining in same game it's almost as if they just didn't want it to look somewhat consistent.