More suggestions....
1. Divisions (ground and air) construction should be modified. They should appear on the map at some earlier point than they currently do, at possibly something like 1% strength. This simulates standing up the division structure. At that point, you fill the division up with replacements (normally). The key things here:
-Divisions in the process of forming/fleshing out to full strength will incur a load on supply (which doesn't occur now)
-sometimes some countries need to throw half formed divisions into the line (Germany/China/SU are good examples).
This would probably involved some rework of the cost of replacements vs manpower cost of a unit.
2. Naval unit contruction- should be tied to a specific naval facility, which would have a specific limit on construction (not always equal to the naval base rating). This would bring in a whole new set of attributes for naval bases. (Just a suggestion).
3. Leaders- I would really really like the ability to have those random leaders, once they are generated, to have the same attributes as defined leaders. Specifically the ability to gain experience and be promoted. As Japan, I'm constantly running out of generals. I'm sure Tibet has a shortage of fleet admirals also, although I haven't checked.
4. Naval conversion-The ability to convert one ship type to another. This should be EXTREMELY limited. Real life examples are conversion of DD's into fast transports (US), coversion of fleet oilers into Escort CV's (JAP) (I'm sure that this would be a show stopper), conversion of merchant ships into "merchant cruisers" (WW1 mostly). Obviously, you can't take a PT boat, and turn it into a Nimitz class CV, and still call it a "conversion".
4. Ability to change A/C type for a specific air division. There are multiple examples of air units being converted to other types. Most examples are German (bombers to Ftr squadrons etc). (Obviously there is a cost involved).
5. Somehow, to cross index names across all appropriate divisions types. For example If I (as Germany) already have the 715th Infanterie Division deployed, then when I build a Garrison unit, it WON"T be named the 715th Festungs Division or 715th Sicherungs Division, or for a militia division, the 715th Volksgrenadier Division. (just a pet peeve of mine).
and now, back to our movie....Deliverance, a love story.