Star Trek

These two had the misfortune of being in the grey zone between background and supporting characters. It's fine for a show not to focus on the bridge crew (who's at the helm on the Cerritos?) but Detmer and Owosekun got a raw deal because sometimes it seemed like they were gonna have some character development. Like in season 3 that Detmer had this bizarre beef with Stamets out of nowhere, and that was probably the only episode where she got more than a couple of lines.

I'm not surprised that the actresses chose their other projects (they were probably at the bottom of the totem poll of the show in terms of pay).

I probably wouldn't have noticed they were missing, but in episode 3 Michael introduced Rayner to the crew and said "You'll meet Owosekun, Detmer and the rest of the crew in a little bit", and then later Tilly said "I'll send Commander Owosekun in", off screen of course. Lame.

I guess I shouldn't be surprised, but I didn't realize there were conspiracy theories floating around about them being fired or some nonsense. I figured the actual reason was probably pretty benign.

I barely even noticed they got replaced. They never got to have any story involvement or character development, just like most of the rest of the bridge crew in Discovery.