lol@Schrek on Penals/Guards.
When you lower them to 4 members and remove any vehicles snares, have at it.
4 members for shocks is fine as they would serve a dual purpose like PZG.
Guards don't have similar anti-infantry effectiveness. You obviously couldn't snare the vehicle and close the gap unless you had two squads.
The unit is still forced to leave cover and close the distance without an ability like oorah to nade the tank. PZG are able to remain in cover and fire with a shreck.
I'm not biased here. I play both sides. I'm just trying to think outside the box to an obvious issue at the moment.