Several players, AKAK, Ramair, Shubie and myself have had excellent luck with a temporary fix for the stutters that seem to relate to a cache issue.
Basically, When you start AH2, look at the planes and vehicles in the hanger. Also look at any individual skins for the planes/ vehicles.
Then after thats done - you should be good to go.
You'll have to do this each time you play ah2 if you turn off your PC in between..
Anyway, If you have some stutters, try it. If it helps post report.