Read through that thread linked to carefully, tis very interesting...
It might convince you to hold-on a bit longer or go for an exchange, if you have one of the really noticeable flaws.

What you described in your OP is mainly just an aspect of Pentile/AMOLED.
It has some nice qualities compared to many LCD's too....
But if you can identity some of the other flaws they may be fixable via sw.
Some of them are def. due to panel used, so a swap would be needed.