Here's one that I just tested and it does work. In the divisions containing artillery brigades replace UGLB_FR_Art_Cdr_Brig with UGLB_FR_Cav_Cdr_Brig. As far as moving around the batteries, no issues, beyond that I haven't tested, even MyGui remains the same on the officer levels. From my SOW experiences, the art battery COs are stubborn to cooperate anyway, maybe with a cavalry leader they may actually behave better.
Unfortunately, they will use the cavalry AI instead of the arty. That may lead to some strange behavior. Still it is worth testing in a battle. Thanks for taking time to try to find a solution to circumvent this game mechanic.
Not to smash hopes, but if you could see the multi pages of requests for Patch 1...you'd understand.
An unfortunate sign that the game was released too soon.
I can make this march and I will make Georgia howl.