I have a possible tier 9 tank to suggest for the upcoming Polish tech tree. (short article)
The ZET-1 (zashchita ekrannaya tankovaya) was a Polish project to make T-54s and T-62s more ATGM resistant in 1964. This involved large screens on the gun and hull. The cage screens mounted on the main gun were folded when unused and unfolded when in combat. The aluminum (I know what aluminum means to WG) screens on the hull were also foldable.
While it did obtain some interest, it was never accepted into service. This can be implemented into WoT on a T-54A. It can provide some protection against HEAT shells while sort of standing out from other T-54/55s. This, in turn, will make Wargaming more likely to accept the tank as a tier 9 medium which will then make it easier for a Polish tech tree to appear. If there is any better alternative, I’ll gladly accept it.