If I was put in charge of the next Smash, I would actually drop any pretenses of being a competitively viable game - remove all the advanced tech (even stuff that has survived since 64 like teching and DI), make movesets ****ing ridiculous and TwoFlickiesCore with only super-iconic characters like the Melee high tiers keeping their kits, expand the roster even further, introduce an equivalent to Mario Kart's smart steering, so on - while it's not my ideal Smash game by any means, I think that'd be more efficient, since there's less keeping up with the meta and it'd make more money, while being more fun than whatever modern Smash is supposed to be - HOWEVER, I would not make the game a slog to move around in. It'd still have super free-form and fast movement, since I think that would add to the chaotic vibe.