The Soviet losing the SU-85 means that he has no way to kill the PIV, Ostwind, Panther or Tiger from bleeding models and forcing retreats giving the Germans absolute map control. Without the SU-85 or Commander specific call ins, Soviets have no AT and no means of dealing with the German armour that forces them off the map and bleeds hard. The only other possible AT for Soviet is to plant lots of mines and hoping that the tank drives over the mine in front of an AT gun. Rarely does this actually work.
Looking at the German losing the PIV, Ostwind, Panther or Tiger means that the German has nothing to stop from the SU-85 shelling away at infantry missing 9 out of every 10 shots. The German is able to kill the SU-85 with a nice PGren with Shrek flank that can kill it in 3-4 volleys and if it gets caught by a faust it's easy pickings for the Shrek or Pak. Looking at the T-34's, T'34s actually have good anti infantry so can bleed and force off. However the difference is T-34's can and do drop to Shreks, Paks and Fausts. PIV's and anything above will not drop to AT nades and AT guns unless the German is bad, misplays and gets caught out of position or doesn't pay attention to his tanks.
Another thing to note is that Panzer Fausts will penetrate the frontal armour of a T-34 or SU-85 almost 100% of the time, where as the AT grenades with less range and requiring fuel to unlock have about a 66% chance to penetrate the front armour of a PIV or Ostwind, and a 50% chance to penetrate the Panther. Combining this with Blitzkrieg, Smoke, the higher health, armour and lower penetration of Soviet weaponry mean that controlling German armour is incredibly forgiving where as Soviet armour is insanely punishing and requires delicate and finesse micro.
Germans also have the option of going to PanzerWerfers to deal with Soviet infantry and AT guns after getting the Panther to deny the armour. So even if there are SU-85's on the field that killed a Panther the German can just ignore them by going for a heavy PGren with Shrek play or straight for Panzer Werfers. Katyushas are only on Tier4, so if the Soviet is stuck on tier 3 than Katyushas aren't an option. And it's so rare to see Katyushas anyway because Soviets need to spend all of their fuel on AT, where as Germans can spend Manpower(Paks) and Munitions(Shreks) to deal with AT keeping their fuel for other luxuries such as Panzerwerfers, Ostwinds or Brumbars for example.
+1
now with that soviet over reliance on su85, bring in the elefant.
zis is not forgotten, however neither is it terribly effective against german heavy armor. 57mm had AP rounds that would shit on panthers with 100% penetration, good firing rate and more importantly, increased damage.
but here, zis has to rely on ~50% penetration and a very poor firing speed. miss the 1st shot, bounce the 2nd, a full hp panther is now right behind your zis. while it has that nice novelty 60muni barrage, i'd rather lose that and get AP rounds and switch barrage for vet ability.