I'm not sure I understand why you want these changes.
Removing troops and only using tanks doesn't really change the game play other than to remove the necessity of cooperation from C-47/M3/... troop carrying vehicles. It takes a more or less realistic aspect of the game and turns it into a stand on this spot until the timer expires video game mechanic.
I can kind of understand wanting more density to vehicle bases (maybe not bases per se, but occupied territory), but I don't think the player numbers would support that. However, it would make for interesting front line battle of the bulge counter plays. If a supply line mechanic was built into this, then it might be interesting.
I'm opposed to sortie limits on fields without resupply unless a full resource management system is put in place. I would really like to see that to put more emphasis on interdiction missions. The closest we have to that now is strategic bombing of factories. It would be very cool to allow rail, bridge, and road lines to be cut to prevent resupply, causing an impact to what forces a military can use.
Less reliance on planes is a bad idea for a flight sim. CAS is more of a desire thing. Anyone can fly CAS missions today. I regularly load up a Mossy and go tank plinking, but it's not something everyone enjoys.