I'm really looking forward to the sounds too, Rise of Flight is a gem in that department and the same man is doing it for CloD so I have high expectations.
I really really really (really!) hope they fix up all the planes so they are using the right fuel, props, are labelled properly and don't have any more broken things to them (Bf-110 canopy anyone?).
No more flickering soft shadows and no more z-fighting would be a bonus.
