Here are my proposals:
-Ostheer: after reaching battle phase 3 and building T3 or T4, Command Bunkers (the one that can reinforce, 150 manpower, 60 munitions) can act as a forward retreat point (only one at a time).
-Soviet: Airborne Rally Point becomes non-doctrinal, renamed to Field Rally Point. Instead of airdropped medical supplies a 250 manpower or 60 munitions upgrade would add field medics to the Field Rally Point.
- In the Airborne doctrine the Rally point would be replaced by Zis or 45 mm AT gun paradrop.
- In Urban defense doctrine the forward headquarters would be replaced by a repair station OR defensive fortifications (similar to ostheer defense doctrine, allows construction of tank traps, trenches and the soviet mg bunkers)