Nothing about patching blatantly op allied AA(centaur, m5)
What would your suggestion be with regards to the only AA these 2 factions have (outside of pintle on ISU / IS2) vs what axis have:
Ost:
222
Ostwind
P4 Pintle
Panther Pintle
Tiger Pintle
OKW:
Flak HT
Flak Emplacement
T4
Ostwind
P4 Pintle
Panther Pintle
King Tiger Pintle
Centuar is expensive in both fuel and pop cap to be the only AA unit. M5 is much better in regards to that but still requires a hefty muni investment, meanwhile both Axis factions have access to relatively cheap AA and numerous sources. Lets not forget what the most dominant Air ability is right now.