I don't understand your point... Nobody DOES want penals with shreks, which is why they have ptrs'... Which are prone to abuse of they have no means to prevent being pushed.
I'm not saying the satchels shouldn't be there, I'm saying sturms need to be viable in the AT department like PTRS penals. 2x schreck sturms would be weaker pgrens. Especially because of the lack of bundle grenades to clear team weapons. Pgrens don't exactly break the game (when allies actually have rocket arty) so sturms wouldn't either.