nah … considering BWP-40 can only be added as non-standard tech tree vehicle … have you seen the amount of USSR prototypes that are left to be added and can be added?
just a few examples :
Object 781 sb.8/ Object 781 Option B
In simple terms: an up-armored BMP-3 or an early BMPT.
A turret having similar armament as BMP-3 but with MBT level armor. Chassis based on T-72.
Object 781 sb.7/ Object 781 Option A
Similar chassis but different turret/armaments. 2x manned 30mm gun pods/turrets. One pod also had dual Konkurs ATGM launchers
BMPT variant “B”
Based on chassis of Object 934 with a low profile unmanned turret featuring a radar sight, a double-barreled 30 mm 2A38 (2500 rpm) and dual Konkurs ATGM launcher.
Now … do you really want a polish BWP-40 over these unique vehicles in the USSR tree?
Hence I suggest: Stop cluttering the already cluttered USSR TT with post-Soviet Eastern European prototypes. Add these unique Soviet prototypes instead.