The kinks aren't going to be worked out until we get a brand new screen technology that's idiot proof or Apple starts dumping more money into QC. All Apple displays have been a lottery for years.
You either accept what you get, or go through the painful process of swapping it, possibly more than once, until you get one you can live with. Just be thankful that you only have to lug a laptop back to the store and not a 27" iMac or Thunderbolt Display.
Very true. It didn't used to be that way. When Apple had the previous generation CCFL LCD's in 20/23/30" they were phenomenal. I had a 23" that lasted me 8 years, and a 30" that lasted 7 (I only replaced it with two 24" LED LCD's).
Ever since they started selling stripped down iMac LED LCD panels with the 24" model a few years ago it was a crap shoot. I purchased two for my Mac Pro, aside from the cables being too short and having to spend ~$60 on Belkin USB/Mini DP extension cables, it took ~ 5 displays until I had two that didn't suffer from banding, bleeding, dead pixels and/or uneven color tones.