Well I like it, performance wise. As the proof of concept - Mantle does it's job remarkably. It's really the landscape changer.
The bad thing about it... out of hundred or so games I own, it works in one single game.
So how about incorporating Mantle in EVERY new game?
Or how about building renderers for existing games, especially for so called CPU pigs?
Q/A wise... AMD needs an army of new software engineers - years ago!
Who ever says that AMD and NV drivers are of similar QA level is out of his mind.
Hire new soft. engineers, Q/A... clean up, build Mantle in more games, maintain, clean up, more Q/A... and AMD has itself a clear winner.
Granted, that assumes that NV/Intel decide to sit aimlessly, and AMD comes up with acceptable cost to benefit ratio.