They really did lose their way post-Bethenny. They semi-did in S4 by trying to bring Cindy in as the "Bethenny replacement," and it smacked them in their faces. The same happened again for S12. Bethenny is a personality that cannot be replaced/duplicated easily. It would have served them better to just... in a way... ignore that she was gone. I think Leah did a bit better than Cindy; Cindy, I felt, melted into the group while Leah stood out in her own way. But, it is clear, losing Bethenny both times shook producers.
It seemed like she was there to be there. Like, "Oh no! You're filming? Awesome! Let me come, too!" Plus, wasn't she there for the infamous "I don't shave my p*ssy" moment from Sonja? Or was that someone else in a different season? Elyse, from my viewpoint, was the Bethenny answer producers NEEDED in S12, especially re: Ramona.
I've always stated this since the season aired: had Eboni come in at any other point she would've been better received. But, she came in when the 2020 presidential election was a major moving point and she was not going to allow Luann & Ramona just coast (nor should they be allowed to), and that was needed. Plus, COVID was still at a highpoint; the city itself is part of the cast, and the city was on lockdown. Even Salem was quiet; I went to Salem (or part of it) this past year, and it was ten times busier than when the cast filmed. They should've paused a full year. They really should have. NYC, unlike any other franchise, is so dependent on the city as being the unspoken "nth" cast member of the season; without it, the season wasn't going to have that push it needed.