Tried out the IS-2 today. Its actually pretty decent considering it can take damage for whatever units you put behind it (think Churchill). The HE ability is quite strong too. It feels stronger than ISU-152's normal HE shell at the cost of vet and some muni. Near pinpoint accuracy which is very nice when fighting team weapons not in green cover like AT guns or MGs.
By the time you get an IS-2 out, you should have an AT gun or two. Fighting Panthers and other big cats is really a non-issue because you will almost never go up against them alone. Soviets are a combined arms army after all.
