My idea on the SU-85 was to make it an TD that is more efficient vs heavy tanks than it is versus mediums. Its penetration might be too much at vet, but it makes the SU-85 different from its smaller cousin, the SU-76. Gives more of a reason to build T4 if you are expecting those heavy tanks. You need a reliable counter versus them and that's what the modified SU-85 offers.
Any word on vp's and cp's not blocking pathing being added from the Mod? How about manual reload for MG's and vehicles with magazines? Also Halftracks gaining veterancy from nearby units? These all seem like crucial omissions from Competitive Mod.