Most people are retarded and don't do smart things. The Sturmtiger is possibly in the top 5 units in the game but nobody uses it because it's "to hard".
In conclusion:
Hahahaha I like your post! btw sometimes angaist blob I love to use SturmTiger and to do some micro isnt that hard.
Maybe just make cooldown that is not counted when the vehicle has no crew? Going over cap is not a bug but the gun that reloads itself without the crew definitely is.
Btw overcapping is very risky as you deny your ability to reinforce the squads when you go into vehicles. It's qite easy to force us players to go into his tanks with artilery for example and then wipe all his 1 man vetted squads spawning falls near major...
As you can see in my video my friend spammed only tanks. No Infantry only 8 Easy Eight.