The way it seems to read to me is that by being a "Limited Job" it may be limited to what it can participate in. We've at very least seen Shiva in the video (and learned from her, at that!) so likely up through the 50 cap battles? It might be a balance issue for later content, and that may be why it's separate but... eh?

Praetorium and Castrum as BLU, please look forward to it.