Main problem with the penal squads remains that you have troops that, once they get suppressed, just activate the Oorah!-ability, break suppression and continue to advance on enemy positions. Encountering infantry/MG’s in building? You have molotovs. Encountering emplacements or OKW trucks? Throw a satchel charge (one for regular emplacements/trucks, two is enough to knock out Pantherturm, concrete bunker etc.). The squad itself can take huge amount of anti-infantry punishment, which in turn guarantees that enough men get through to throw the demo charge/molotov.