I like Feats too, but the more you have, the harder it is to keep them balanced. I mean, look at 5e. There's what, 75 Feats, and the gulf between the top tier and the utter trash is huge.
If you are going to have a lot of feats, I like the way PF2e does it. Feats are split into Racial, Class, Skill, and General; you get specific slots for each; and feats are level gated. It is slightly less customizable than 4e but at least you don't have to balance and compare taking a feat that modifies a Class ability vs. one that modifies a Skill. It also makes decision making at level up easier -- there are a ton of feats but your relevant set to pick from at any given level up is significantly reduced.
That said, I wouldn't mind slightly less and chunkier feats in a 4.5e.