Last night I joined a base take effort that was being thwarted by LVTs from a TG parked offshore. It went on for a long time with plenty of air-air and ground action.
Then, I noticed a friendly base on the other front that was WF and had no friendly spawn. No enemy aircraft there, but a stream of GVs who had already killed the VH, ords, and radar and had camped the field. I joined the 2 guys defending and spent 10 minutes circling the town in a light fighter watching for M3s and dodging Wirbs. Fun! Then a few enemy aircraft showed up to pick the defenders on the deck looking for GVs. Combat!
Bottom line, there was more air-air action at the "stalled" base take than defending a base without resupply. There's no guarantee that nerfing M3s is going to produce air combat heaven.