Well I spent quite some time calibrating it and now it looks almost as good as my P2414H. The viewing angles are still not as good but overall a very good buy considering the prices of the IPS G-Sync Monitors. I can say they are not worth it at all after adjusting the colour profile.
Yeah they calibrate decently - I have no idea what AUO were thinking with the out the box gamma* - but at the end of the day it is a gaming TN,
* Though with their gaming BenQ monitors they make a big thing of their Black eQualizer features so it might be optimised to support that :s