You can, but it would be irrelevant on the topic of SU85s.
If you cant differentiate between individual balance issues, that is your personal defficiency, and not one that reflects on concerns on the Su85s efficacy in current balance.
Ive seen PIVs countered by Guard and SU76s by Stephenn, among other options.
The SU85 simply moves too fast in comparison with other vehicle speeds.
Only someone who is unaware, and therefore uninformed, of the actual vehicle speeds would claim otherwise.
It also comes out exactly at the same fuel/timing point as PIVs, to which, at its current speed, it is a categoric counter, which makes obvious an issue with its cost.
As the relic dev has already pointed out, u cant just tweak one unit in a way it wouldnt affect the team balance in whole. Honestly, if u want to nerf SUs, then buff T-34s so they could stand against P4 and not just be a costly battle ram, creating other equally effective ways of playing soviets besides spamming SUs. And should it happen, im pretty sure the likes of u would immediately create a new thread whining about how they get raped because of OP t-34. Mostly, this game is quite flexible. There are tons of ways for dealing with SUs as well as with german tanks, and imho the latter are far more difficult to handle. Use ur damn brain and it will reward u with unforgettable moments of triumph over seemingly imbalanced forces. I really enjoy COH multiplayer (Being russian, i simply cant stand that ridiculous story-telling) and I do enjoy fair fights. Im not saying the game doesnt need balance changes, but it is still perfectly playable and fair enough.