Mobile artillery would be a great addition to the game. Axis 105mm and Allied 25pounders would be great because you could fire from the spawn at a town, base, factory or whatever and do great destruction instead or risking your lives getting into closer combat, and you might be saying now, great if we get these then we'll just might as well shoot ourselves. But before you do so consider the following
1) armor is considerably thin
2) speed considerably slow
3) firing rate would be like a 5 incher on a destroyer + firing on a period of time could knock you off target
4) you would have to line your gun up by driving into position before firing and do it on flat terrain to make it the easiest at firing
5) the considerably low speed and armor and lack of rotating gun makes it a bad close combat weapon
6) must be stopped to do accurate fire
But whats great about it is its MASIVE range, damage, and accuracy making it ideal for the game. My vision of it is having it similar to a 5 inch but on tank chaise
it should be easy for HTC to make i think, just make it so a tank chaise carries a gun similar to a 5 inch and fire the required round at the correct velocity, range, and do the correct damage.
Thankyou for reading...
Skyguns