It depends on how you define power. There are some interesting ones, like telekinetic, sentinel, etc but I miss some good caster feats. Besides war caster, elemental adept and some that add a few spells there are not many interesting ones, like the metamagic feats you mention in pathfinder.
I'm kind of hoping we get an official 160+ page book of nothing but feats for 5e. Let's find out just how fast a halfling can run.
