Gaijin should rework on the PvE for Helicopters, instead of using the air maps it should be the ground maps. (that’s all I can think of for now) and allow the aviation tree (premium and squadron) to share experience with helicopter/SPAA
Add a new SPAA PvE mode [Air defense] the mode should be straight forward, defend against waves of heli + CAS trying to destroy an objective while utilizing the ground battle maps.
this was made up for air battles but with a little tinkering can be done up for helicopters and even all ground vehicles, not just SPAA
I don’t see the need for SPAA grind - most SPAA come fully adequate and ready to take down the plentiful CAS that you see in ground modes. Only a few struggle with stock grinds, typically those that are placed at a BR based on a Tier IV modification (M247 at 9.0 because of HE-VT, for example). Even then, some stock grinds are helped by way of the SPAA being good at taking out ground vehicles.
Helicopters are the big issue, imo. You can toggle on to grind helicopters using ground vehicles, but then you’re simply left with a bunch of stock helicopters that are often unusable in their stock state. Still helicopters in the game that don’t even have stock ATGM. It’s to the point that I have the entire USSR helicopter tree ground out but I’ve hardly even used them due to the massive modification grind (300k RP for top-tier).