My guess is CX will have a dedicated "First" area which also permits DMs (yes. Regular DMs) but not OWEs, similar to the Bridge, however regular DMs will not be able to bring guests, whereas DME/DMP can. That's my best guess.

Judging by the limited visitation to that (very calm and peaceful IME) DM/F room at the Bridge, I suspect most lounge patrons are OWEs and/or guests of DMs using the very generous +2 guest policy.