+1
Just wanted to point out that they have the costs of elite infantry but obviously not the same performance. Earlier arrival + new vet1 is a step in the right direction. but i think further changes are probably needed.
So, I suggest an anti-infantry upgrade for panzer grenadiers, somehow like new panzerfusiliers. They can have either anti-tank or anti-infantry roles:
Infrared StG44 upgrade: provides 2 squad members with StG44 rifles, increases squad size by 1 (need reinforce, 90 mun maybe)
Vet 3 bonus: +passive healing, increases survival chance
Current modifications and costs are fine, i like combined arms. StG44 maybe replaced by one LMG34 (fires on the move, like obers).