So you want the Tiger to be, well, invincible? OK, maybe reality backs that up. Say, add dispersion to other tanks (like the SB already has) but keep the Tiger tight. And, obviously the Germans had way better optics so model that as well. Then what would the ground game be like? The Tiger already has a K/D of 5 to 1 against the M4A3(76), 4 against the T34/85, 9.5 vs the Panzer, 72 vs the T34/76, and 95 vs the M4A3(75). Increase those numbers and all other tanks become useless (well.. even more useless). Do you really want everyone to drive Tigers? If they did, how would a Tiger have any advantage left?