Well, complaints against Urban Assault Panzergrenadiers have caught my attention, and I'll look into it. Somebody said they get 5 armor? (lol) I'd just replace that with the shock troops' armor values of 1.5 then add a bit less received accuracy for their upgrade bonuses.
This is the most interesting ability of all. What do you do when your squad gets pinned by MG fire? That´s a squad out of the game for you. And how big was the additional manpower income before you nerfed it and afterwards? This ability is hard to balance. Versus Ostheer I imagine it being way less effective than versus OKW simply due to the lack of suppression tools. Though the Flak HT might work wonders.
Also, they could out suppress their suppressor with maxim spam. It was quite interesting. +50 Manpower income permanently and the -90% build speed really screwed things up with balance. Not to mention, with the old Manpower blitz, you could gain 2000 manpower immediately, if you had what the fuel and munitions costed, which was much lower before.
Finally, I'll add a fuel income penalty (Not an initial cost to keep it from being a more expensive version of the ol' Munitions to fuel transfer) for the Munitions Blitz. They can still survive without tanks, thanks to their amazing initial tech buildings, and it has been demonstrated that it works by the amount of fuel people dumped on Troop Training while that was available.