The StuG III will always be somewhat useless once Su-85s hit the field which can spot for themselves on the move without a doctrinal ability and still have 10 range more. The very least that could be done to StuGs is a range increase to 60 range to fire back (not even having the initiative as they can´t spot the Su-85 while driving to it with the scope upgrade).
The impotence of the StuG will become more evident when IS-2 and ISU-152 are buffed next patch. They already two-shot them.
Your saying that as if its a definite. Pretty much all T3 it could be argued it useless when an SU85 hits the field.
Its an 85 fuel tank. It should perform like an 85 fuel tank. If they wanted it to reach out and slap an SU85 nothing wrong with that. They would just have to make it fire BBs like the SU76 or something similar (maybe a little more dunno) but it shouldnt be able to compete well against an SU85.
It can quite easily Murder T34/85s if supported and all of Soviet T3. Just requires work which most dont want to put into it.
Its as hard to counter T3 soviet with a Stug as it is T4 Germany with an SU85 imho.