Please please, PLEASE don't use the god awful IL2 1946 QMB, yes it was better than the current one but only slightly. It was good for a quick dogfight generator for target practice but a good QMB needs the ability to create missions with take-off and landings etc.
Also don't use the old IL2 GUI, it was boring and had no period feel to it (no neither does the new one). I suggest creating a new one with WWII character to it, EAW had a great feel to its GUI. Have a look at the EAW manual to jog your memories.
http://vztimg.exent.com/Prem/products/190450/manual.pdf
Barracks, Hangars, Squadron rosters, Squadron Leader's office etc, the ability to turn on the radio. Also add the ability to pick who flies the missions from the roster and so on. You know, the kind of things sims were doing 15 years ago when immersion was still something sim developers strived for. Something the entire IL2 series has lacked in every single iteration... oh wait, this doesn't bode well. Another IL2 sim that caters to the online mass... er I mean tiny minority
