dude, before this patch you were overpaying for your tanks, only P4 seemed viable and Panther (but panther price was totally imbalanced) and soviets had only SU-85 as a viable counter to P4 spam. Remember price for IS-2? 300 Fuel and tank was useless? also 290 Fuel for IS-152 that could be also easily raped
if being useless at the high price is a problem, then buff the tanks. the is2 received a price reduction + a heavy damage buff. the isu152 can be easily defeated if a tank is able to flank it, but keep in mind that the isu152 act as an anti everything because of it's long range and huge damage, and it's meant to be behind the lines. if the enemy cannot attack the isu152 then the tank will ruin everything the germans have.