What someone commented in another forum is there are rumours that, when Prigozhin went apeshit, Putin was forced to have a closer look at what Shiogu and his clique were doing, to Shoigu's detriment.
They spent more than 10 years trying to unfuck the boat, and couldn't do it(although they managed to make an unfucked version of her, which is the one being built now). I guess they are saving the money that would go to her upkeep.