You do know that damage involves aoe ai capabilities, right ?
Changing the damage from 240 to 160 won't do anything unless you'd completely rework the KT's AOE damage/radius along with it. It has a lethal AOE radius of 3 no matter if it does 240 or 160 max damage (because it has 84 mid range AOE damage). Improving the scatter without lowering this AOE would just turn it back into the old wiping machine. But scaling down the AOE profile along with scaling down to 160 damage would just turn it into a Panzer IV with more armor and HP, but then why would anyone pick it if they could get two Panzer IVs with twice the firepower for the same price?
The one way to increase the KT's reliability against infantry without making it OP again is to use a Brummbär-like AOE profile where it does mainly - but consistantly - high HP damage in a large radius instead of model kills. Then scatter could be buffed and its AI damage would be more reliable and consistant without wiping squads left and right.