I noticed that Uldir didn’t have this either, but the raids from Legion did. Were there plans to add skips to the last two bosses if you’ve killed the last boss 4 times? Some of these bosses can be annoying to rekill on Mythic, like Mekka and Conclave. Uldir had some sort of soft nerf each week with the increasing stats after killing 3 bosses that week, BoD does not have this.
My guild isn’t on M Jaina yet but when we finally farm her, I doubt we will be able to get every player the mount before 8.2, and it won’t be that fun to spend a few hours of precious raid time to clear the entire place.