Honestly, I would love to see the next Smash be a reboot where most of the roster gets cut.
Plus, there's lots of potential for veterans whose movesets haven't been updated for decades like Samus for example.
I mean smash is a crossover with like 200 series cutting most of the roster without cutting essantials like A young link, bowser jr., pkmn trainer or entire series is pretty much impossible!
I do agree that we could scale the roster down, esspecially if we only have like 6 third parties and get rid of beloved but not as essantial stuff like:
Rosalina/Daisy, sheik, lucario or incineroar and some fire emblem stuff!
But even then which characters need full reboot reworks?
Like link(s) and kirby only need adjustments,
Mario needs some bigger tweaks, Samus seems mostly okay too!
I think the biggest changes the original 12 need are:
Dk needs a full rework, luigi should be DeWeirded,
Ness (and lucas if hes in) should get a meele weapon for some normals, maybe replace jigglypuff with screamtail to keep the archetype but remove some gen 1 focus?
Thats the biggest issues i can see!
(Other then falcon and fox but they dont have any on foot stuff to begin with!)