If I can switch off feats entirely and switch on Vanceian magic, then I'm OK with this...whatever.
Now, when I say switch off, I mean OFF as in just say "those things aren't included" fullstop. Not "now I must rewrite how characters are handled" because I could make 4e into AD&D using such a method. Doesn't mean I wanna go through the effort. (And I don't, and I won't.)
Then it's not a dealbreaker.
If classes were handled like this, would you be okay with it.
Wizard
1st level: Spellcasting, Familiar, Bonus spell or Module Bonus
2nd level:
3rd level: +5 HP or Module Bonus
4th level: Bonus spell or Module Bonus
5th level:
Feat Module: A wizard may choose a feat from this list if using the Feat module
Skill Module: A wizard may train a new Skill from this list if using the Skill module
Contact Module: A wizard may gain a new Contact if using the Contact module.