It has been 8 years since our last Princess cruise. At the time they didn't have eggs benedict in the buffet. Perhaps Celebrity took a queue from them.
I just prefer to eat breakfast in the dining room because of the service, not having to search for a seat, and also because it is more relaxing to me. It was easier to use the buffet on the Equinox because we were nowhere near full. They only had one dinner seating for both nights. I walked off the ship this morning all by myself.