I agree with your premise.
However, I'd far rather see feats Go Away. Bake the key elements that make a class what it is into those classes and bin the rest. ASIs, on the other hand, while somewhat unneccesary are all in all relatively harmless.
Boom. Simplified gameplay (and simplified build phase), and way fewer balance/optimize issues.
Feats may be one of my few must-haves.
I much prefer customizability to simplified gameplay. I pretty much hate everything simplified gameplay has done in the field of D&D because unlike some other systems, D&D and its children can't seem to make character creation and advancement fun while doing it.
This all goes to my point that an essential element of D&D is level based classes with very strong archetypes in universe.
The wizard uses a spellbook, can't heal with spells, wears no armor, and his or her weapon options are terrible.
The issue is that said archetypes are so strong and enforced that us humans get bored of seeing them. Then we want to tweak them and can't agree how. And we get bored of them faster now that other media have copied the D&D class archetypes so you already see them a lot.