I still believe that feats are largely an attempt to make up the power gap between fighters (and maybe rogues) and the spellcasters. If fighters are stuck with only "basic attacks", they truly do become more and more irrelevant at higher levels. If 5e does not include some feats, it needs to include a weapon specialization/ weapon mastery system like older versions. I personally wouldn't mind seeing a more balanced implementation of the BECMI weapon mastery system.
I still believe that feats are largely an attempt to make up the power gap between fighters (and maybe rogues) and the spellcasters. If fighters are stuck with only "basic attacks", they truly do become more and more irrelevant at higher levels. If 5e does not include some feats, it needs to include a weapon specialization/ weapon mastery system like older versions. I personally wouldn't mind seeing a more balanced implementation of the BECMI weapon mastery system.
With a skill system where you can invest points as you choose, any feat system should not grant +X bonuses. Instead, feats should open up new options or methods of using skills or abilities.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.