Well, one thing that would add to the authenicity is an accurate recreation of the call-signs used in combat. I don't know about those used by the Luftwaffe but in the 8th AF there were two sections per squadron, each with their own call sign (Newcross, Reflex, Keyworth). In each section there were 3-4 flights usually designated by a color and then each flight consisted of 4 planes numbered 1-4. An accurate call sign might thus be 'Keyworth Blue Leader' who, by the way, was Gabby Gabaraski.