Yea, the soviets got too caught up in spamming tanks to remember they can tech to things. Another Katy instead of the 2nd IS2 would have been much better. With the abundance of indirect fire Allies have, PAK spam should be the least of your worries.
Actually even the katy he had was the most useless katy i ve ever seen. Instead of firing at OKW t2 when all the inf retreated he was firing at p4s. Seriously... its a 2v2 its meant to be a teamgame