@spectralhunter: I'm not sure that Larian would have to "give SS more bonuses to compensate for lack of cover". As you mentioned,
Originally Posted by spectralhunter
I suspect we haven't seen SS yet because Larian is well aware of how powerful it will be with advantage
With easy advantage, the feat is too powerful. Larian (if they change height bonus to +1 or +2) should just remove the "negate cover" aspect of sharpshooter and I think the feat will still be relatively balanced?

I definitely agree with you that Larian shouldn't keep height-advantage and have SS give a + to hit.