One has guard, cammo, mark target and IL-2 bomb strike doesn't have need to have double ISU-152 call-in, and you've agree that double call-in is a nerf.
How can you compare 85s with isu152, single isu costs 260fu and 700+mp to field, same as 2 t34-85s, and it obligatory to have 1-2 t34/76 before calling the isu because it needs to be protected by other tanks. With 85s, you can easily field 4 in one game, if you lose 4 t34-85s, then l2p. Dayum bruh