Oh, this is easy:
1. JS support for prop control (RPM)
2. Mixture controls w. JS support
3. turbo/supercharger controls
4. For 1 through 3:
- Allow engine management to be a realism option;
- Allow a SLIGHTLY higher power output with manual EM (if configured right, that is). Of course, the appropriate penalties should be implemented, i.e. leaner mixture yields higher output and also higher temps, especally at low speed (in a climb, etc.)
5. More planes! Any kind is good, but I would particularly like to see some "exotics" like the ME-163 and Gloster Meteor/ME-262. I also think the Douglas (I think?) A-26 Invader would be FABULOUS!!! If you do an A26, please model the wing properly. It landed flat (no flare when using flaps, it would stall!)
6. Manual control of field acks
7. Surface winds (x-wind in a taildragger is fun!)
8. Auto-gunning buffs (that you can disable, of course)
9. Again - REALISTIC ENGINE MANAGEMENT! =)
10. Change to the field damage systems - allow cratering of runways to significantly impact operations. Seriously - this was a major tactic in the war. Perhaps deepen the craters so planes can't just roll over them (deformation)? Also make the craters stick around for a while... maybe 10 or 15 minutes.
11. To go along with the above - place a berm around the FHs to limit "off-field" operations. That's the only way cratering will work.
I could probably think of more, but it's too late in the dev cycle for most of this stuff anyway. Maybe in 1.08!
BB