I suspect that the skins and how they are randomized makes it much more difficult to create units for M2TW than RTW. I sincerely hope that CA will release a tool to make it possible. Yet they did not do this for RTW for whatever reasons.

Hopefully, in the next few months someone with far more talent than I will figure out to at least alter existing models. Being able to alter existing models would open up major mod possiblities.