On the other hand if you want more mobile, effective in move infantry you can go penals. I would try to avoid any sort of overlap with concripts. If we gonna make coscripts too good in move, very mobile offensive infantry then penals will loose their meaning.
Soviet faction doesn't have mainline defensive infantry, conscripts could fill that gap. CoverBonus could help making that real.
So how would you change conscripts to make them worth using and still keep them unique?
Or simply combine conscripts and penal and then stop this ridiculous idea of roles: if Mercury is a green cover, then conscripts will be more useful. Penalties are superfluous and have always been superfluous:
Conscripts: main infantry and support.
Guard: ranged combat and anti-tank support.
Shock troops: CQC assault unit.
Penal: what is it? They didn’t fit into the concept of infantry from the very beginning of the game’s existence, and therefore they invented absurd roles: an expensive suicidal assault squad with a explosives and good self-loading rifles, then for some reason they were given PTRS, although the Guard exists.
Remove Penal transfer SVT-40 to conscripts, transfer the explosives to the Engineers or the Shock troops. And the whole puzzle will be folded into the picture, instead of sculpt pieces where it is not suitable.