I think we've already been over this. If we want to get player-controlled infintry that plays a significant role in the game, then all of the game dynamics will change, and we'll need a HELL of a lot of coding.
If we want player-controled troops that play a significant role in the game (as in we don't just have players run individual troops to the maproom) and a non-half-arsed backdrop for their figths:
We will need the insides of buildings modeled, the interaction of troops with vehciles modeled (ie, they die when I run them over with my Panther), a nationality for the tropper decided upon (for chits and gigs, I would go with something unexpected, like Finnish), weapons modeled for the troopers, improved trooper animations (they can crouch/lie down, and lean around corners and such) player interactions with transport vehicles (jeeps, halftracks, C-47's), and depending on where HTC wants to go with it, we'll need to model trooper-controled anti-tank weapons (be it towed AT guns, or bazookas).
And the troops will eventually relegate everything else (save POSSIBLY tanks, although I'm not sure on this) to a support role. Unless the troops have a semi-significant role to play in the game (at least as important as GV's), nobody will use them ouside of isolated instances. This means that most likely they'll have something to do with the capture and defense of bases.
GV's will then take on a mutual-support relationship with the troops (possibly, they might end up in a pure support role), since the troops protect them from enemy troops with bazookas and molotov cocktails, and GV's will be able to more effectivly deal with other GV's and aircraft.
We can also reasonably asume that groups of troops and tanks will be the most effective method of stopping enemy troops and tanks, as troops will be too small for the aircraft to target individually.
This means that the aircraft's primary role to play will be to soften up targets (for the infintry), to take out enemy tanks (because tanks are valuable support weapons for the infintry), and to shoot down other aircraft (because enemy aircraft help support enemy infintry).
CV's will shoved even further into the support role, as instead of serving as support units for the aircraft, which are the primary focus, they will be serving as support units for the other support units.