There is problem with such upgrade which apparent with Sherman dozer upgrade. The low cost allows early access and the upgrade makes the unit remain good through the game allowing to spam the unit.
In addition I doubt it would an effective change even if it was implemented, with the 7 men upgrade and by moving doctrinal tank to T4 Soviet want to build the T4 as soon as possible and once it is build the SU-85 would remain a better option than SU-76...
your two statements contradict each other... on one end youre concluding that the upgrade makes the unit lame and spammable and on the other youre claiming it may not be enough because the soviets still have the SU-85/zis/7 man on T4 combo...
this is exactly why the upgrade is necessary... that ways the soviets dont rely on a one trick pony for the lategame and can function efficiently either with multirole SU-76s or the SU-85/zis + T-34 trick...
It is not a question if it should be a hard counter or not but how easy it counter. Ability to selfspot even beyond max range nearly 100% chance to damage as PzIV at range 60 is bad design that ignores two game mechanism (chance to hit and chance to penetrate).
To put in plain English if the SU-85 on top of that did 640 to PzIV it would "crush the panzer 4" "as it has every right" but I think we can both agree that it would bad for the game.
As long as the SU-85 is better vs every target than SU-76 and as long as the zis has a close enough barrage there will be little reason to build SU-76.
the argumentum ad absurdum falls flat at the original premise though, remember that on one hand we have a specialized anti armor unit that costs more than the generalist armor unit... it should absolutely crush the generalist... however if the SU-85 did 640 damage per shot it would be soo OP that it would literally destroy every other armored unit ingame in a 1v1... hence it is no longer beating the generalist armored unit alone but also more expensive anti armor specialists such as the JT or the elephant...
the SU-85 is balanced right now because it strikes a balance between how much it costs and what it should counter... send a medium generalist at an SU-85? it should go poof... send a JT on an SU-85? expect the SU-85 to go poof....
Think you overestimating effect of the 0.6 difference is speed at vet 0. If that was the case SU-85 would completely own the PZIv once vetted
the Panzer 4 has a powerful vet ability that causes it to run on overdrive... if we talk vet we also take into consideration its abilities....
That was in 2018 and the Stug got the same treatment. In the same patch it got a buff to its barrage.
i dont remember the exact stats but i remember the SU getting nerfed first and getting nerfed harder
Are you seriously going to argue that Puma being x130% better at ranges 0-10 gives it an advantage when Su-76 is x213% at range 50?
when you take the turret smoke and vet ability advantage? yes of course... a puma will crush an SU-76 on a 1 on 1 easily...