Germany wasn't on the complete retreat by 43 and so Albert Speer will probably become minister of armaments. So the tanks will still be over engineered but you will get more because of centralization on Speer's half.
What about tube artillery? I've read a lot about projects like the SFH 44 and the lefh 43, but I haven't been able to find any concrete info on them. What would the German artillery arm look like?