I wrote that some months before. I think the ISU-152 was notorious for using its HE shells versus vehicles. Believe it or not: The AP shells could bounce off, the HE shells would however devastate the target. Give it an increased reload time but let it fire its HE shells effectively against vehicles and infantry alike. Maybe an "AVRE/ Sturmtiger light" approach would fit the vehicle, where you fire a devastating shell every 20 seconds.
what would be the point of uidng AP shells then lol.
Me personally i would be happy if its AT improved but at the cost of losing some of its AI. It currently can wipe squads in 1 shot and then by buffing its AT its going to counter tanks too. IMO it should either excel in either AI, AT or have its AT buffed and AI nerfed a little to make it good at both but not excel in them.