I already said it: THe combination of 70 range and the speed and maneuverability of a medium tank chassis would lead to an untouchable vehicle. Elefant and ISU aswell as the JT are slow as hell, which justifies their range.
Why will an Su 100 be OP, the axis has the JT, KT and Ferdi, while the sovjets are stuck with the poor Su-85 and call in mayhems. Su-100 is just as justified as a KT, Panther and the super heavy call in TDs.
It is fair and sqaure that they get access to That and elite non doctrinal infantry. In my opinion, the whole sovjet faction needs a major redesign.
Another super range unit would suck, I think everybody should have recognized that by now. It´s just lazy. Park the unit and destroy stuff. Some people just need to accept the asymmetrical game design and balance. Germans get better non-doctrinal tanks, so what? Russians get cheap mines, the (imo) best medium tank (T-34/85) or another game-breaking super-unit (ISU).