It sounds like it's sold out, although I wonder whether the two D1 seats could be a matter of point of sale or even something involving married segment availability that EF treats differently from DL.

I'd assume that by the 30th, the flight will be overbooked in all cabin classes. OPUPs obviously require open seats in the higher cabin, so. IMO your odds of an OPUP aren't great, but as a DM you won't be IDBed either.