Only pilots eligible for the MOU could go, and they could only fill the JQ MOU slots on the QF list. However, those 6 slots were withdrawn as the MOU only specified command positions. No FO.
I think you may be a bit off there.
Previously there were some JQ pilots awarded MOU positions as S/O but the contract only allowed for a move to F/O or Capt so the positions were revoked.
I don’t know about this latest offer but I’m pretty sure they are permitted to take F/O positions. Whether anyone would want to is a very different matter.