Putin- No. The 3x3 destruction from the AA explosion could be turned off, and it has a 30-75 degree axis so it cant destroy many low buildings anyways.
Valor- Its just more voxels in a model, running some code. It would not be computer intensive i suppose, and Mat^2 might add the OpenGl Client to use GPU acceleration, making the game run faster for most computers. I'm not very tech savvy though but i'm pretty sure you would still be able to run AoS up to speed.
Diggy- Flak cannons would I think in my opinion work because, Good base defense, Hard to destroy, and an anti camping weapon. It would be annoying trying to have to aim for the heli with an SMG, and if it was your only defense against flying vehicles you could be easily camped if there were not many people on the server.
The boats are opposite however, Driver in the back, 3 passengers in the front that can shoot out with their guns. No mounted machine gun, as it can be used for a camping weapon.
TheSidodias- Manually, and if the view distance is increased/map size maybe about 5 units on the map grid. Maybe less as there is Bullet drop for the AA because the shell is so heavy.