Answer: It works quite well. Grenadiers are still stronger than conscripts for cost at vet0, and god help conscripts after the grenadiers start getting vet or lmg42s. Massed grenadiers have even less counters to them than massed MGs.
It does require a bit more effort as with MG42s you can just attack move straight to their base and be more or less guaranteed results.
sadly true. and swarming grens/pgrens even helps more in late game due to shrecks/fausts
as a Soviet if you want to slow down tanks with infantry you have to call in a doctrinal squad and use button (which lasts a few seconds and can be broken out with smoke or suppressing/stunning/killing guards), as German you can just use basic infantry with faust (which damages engine indefinitely)