ORIGINAL: fuzzypup
I will put it on the list of considerations during Beta testing.
If there are some technical difficulties (in programming work) to set the "scale" of the detached unit as division (detached unit from a Pz corps), perhaps could you take this medium solution (tip) : a pz corps may divise itself in 2 "half Pz corps". Each "half pz corps" will keep the corps status (not division status), but with half force of initial total force of the concerned corps
with this solution, each of the 2 half corps will be considered to receive half of Pz forces and half of the support units (mot/mech inf, mot arty, mot engineers, etc)
In this way, your initial programmation system/work will be keep
and we could have splitting for pz corps(it would be a "special" splitting, different from infantry units splitting : to split a pz corps will give 2 half pz corps in all cases, without division status. And later, these 2 halfcorps would be able to merge again (Together or/and with another half pz half corps)