It's just that Jaffar is there since... always. And all of Kim's content, The Incredibles, and Big Hero Six, feel like the missions that lead you nowhere in Red Dead Redemption 2. It's not a bad thing to add them, but at the cost of delaying the game?
They could be in the postgame, like Four Elements Trainer, which is already finished but continues to release content, or alternate between a princess and a Disney or Pixar character who isn't a princess. I don't know; it's just an opinion, and I could be wrong since I don't know how a game like this develops.
But if you see that the game released 5 years ago and we are still in the 0.25 version, by simple math, the version 1.0 will come in 2040