Sometimes it's not that easy. If the genius can't see it you have that issue. If you do get another there is a good chance it's going to be the same or worse. Tough call.
True. That is why I never exchange. I return within 14 days and then buy another a little later. But you're right, these decisions are never easy and on the next try you may get the same, worse or one with a different issue. I would never recommend that someone keep a device they are unhappy with however.
A separate problem here is that many don't see uneven color tints or if they do, don't care. Derogatory comments are made towards those who do and also leave the impression that most others are getting perfect screens.