THIS, so much THIS.
It drove me mad in XI and it's no better here. WTF's the point of targeting something so far away NO SKILL AT ALL can interact with it?
As for dead mobs no longer being targetable; about time! Why XIV can't have XI's auto-retarget I have no idea, I hate the fact I have to manually re-target in a group of mobs when one's dead, the lag is terrible and TABbing around to get to the one that's currently hitting me is a pain.