Turn the Pak 43 and 17 pounder into 90 range static ATGs that are easily decrewed. Remove their ability to fire through shotblockers.
Turn the Bofors into a much cheaper, brace-less emplacement that a lone mortar can clear out given time (like the OKW Flak).
Turn the Mortar Pit into a 180 MP unit that has no Brace, the durability of an Ostheer bunker, and requires a garrisoned squad to autofire.
Now this I can get behind.
Throwaway emplacements, literally perfection.