Its good to see Klingons be almost as badass as they were in TOS until STVI. After STVI and in ENT they seemed to me to be acting like a bunch of drunken jocks travelling around the galaxy. However Uhura was wrong because in TOS, Klingons didn't crap on about honour and I'm disappointed that they didn't just try to destroy Mudd's ship without warning.
Forget the augment virus guys. It was all a Nexus dream. The Klingons always had head ridges and they always looked as they look in the current movie.
The Romulans always had ridges or never had ridges. No explanation. None needed