disagree, a straight nerf is too much for a doctrine.
Not if doctrine is overpowered, which is exactly the case.
You literally see nothing else but VSL 2v2 and up and everywhere in 1v1 below top 5 ranks.
imo VSL becomes a issue because allies players chose not to adapt or not used to fighting toe to toe with grens.
Go adapt to T-70 and ram and ask for removal of nerfs.
allies have many counter to VSL doctrine. IS2/ISU152/KV8, Croc/AVRE, Rangers/Pershing. Ok maybe Usf gets it a bit tough. But goes to show a good infantry foundation helps, which allies have always enjoyed over Ost.
VSL is very early game upgrade.
EVERTYTHING you have mentioned is DOCTRINAL and VERY LATE GAME.
Put two and two together and even you will see that requiring super heavy AI tank to fight MAINLINE INFANTRY means something is horribly wrong with that infantry.
In fact, you have just made the best case possible on why VSL should be nerfed ASAP.