Yeah there's something wrong. Mine is yellowish and it's not as bright as my 6+ sitting at my desk with normal lights on. I thought it was me this weekend when I thought my 6+ had a better screen. When I put them side by side right now it's clear my 6+ is a brighter, sharper screen. Sigh.
Sorry to hear man, you definitely dont have one of the panels Displaymate tested. Go get it swapped out. Put it next to the beautiful display models that always seem to have perfect screens for some reason. Imagine people holding Apple accountable for waning to get exactly whats put on display.