Panzergrenadiers with 1 Panzerschreck were tried in the original CoH2 Beta. It was a bad idea, it just made blobbing stronger because you would have 3 rifles per Panzerschreck, effectively being both AI and AT in one unit.
Are the new sturmpioneers going to be like this, having a shreck and 3 stg 44s. But wait, they also will have the bugged stun grenade for stopping retreating units and have better vet. This might be a new problem.