I think Feats can undermine creative play, but generally don't.That's the problem with Feats,in a nutshell: they undermine creative play.
Quick Example: Keen Minds ability to always tell which direction is north. That doesn't suddenly mean no one can make a check to determine which way north is, Keen Mind just does it automatically.
In fact, feats can even serve as a template for creative play. Perhaps a paladin gives a big speech, and gets an amazing 25 on their persuasion. DM is trying to decide how to rule the effect, and decides to give the effects of the inspiring leader feat. Doesn't mean the paladin can do it all the time, but it was an easy way to rule the current situation.