Seems like it could be a representational nightmare depending on the issues which come before the combined MEC.
Comair, a wholly-owned, does not sit on the DAL MEC. And if I recall, XJT was split from CAL's MEC as well.
I don't have a dog in this fight, but seems to be appropriate to me that CPS have its own MEC to conduct its own business. Nothing says their still can't be coordination with the branded MECs.