*Give to PzG some kind of buff when they are near tanks or halftracks;
*shreks upgrade after T3 research.
To complete my own ideas:
Give some kind of "dug in" ability to PzG when they are near tanks or halftracks, like the soviets HTD. This PzG Hit the Dirt can have some cooldown when in use (to prevent spam) and will open more tatics with PzG and vehicles, like spearhead pushs in open fields (REAL LIFE TATICS MAN ).
Hit the Dirt
Suppression immunity. Squad will gain 'light' cover(-50% received accuracy.) Squad will not move.
And about AT capacity:
Give to PzG the Panzerbüchse 39 AT rifle upgrade. This weapon will give some light AT to PzG, but will cost less ammo and will maintain some AI capacity to the unit.
Maybe theres voice lines in SP campaign to use that weapon in PzG.
And the last one:
Urban Assault Panzergrenadiers upgrade for the unit. Im not talking about the commander, only an different upgrade for the unit: