They've got no choice. They'll not pay the millions upfront to sack him. Its like on Fm when you've got Smith on the books for the final year of his £60kpw contract, you try a mutual termination but he won't have it, then you hover over the release button, stuck when you see it will cost you £3m...so you leave him there. They will have to pay hin in full to go, so if you can't remove him, move him sideways, upstairs or somewhere else, at least he's doing something and you get something back for your money.
Also any manager worth having won't go anywhere near that club, they are a disgrace to football and on course to destroy rovers. They could find themselves in a situation where they sack him, then find no one better wants the job. Could also see them being so s*** they move him to a new position only to bring him back as manager again as no one wants the job.
Surely Kean isn't on a contract worth millions though?
Saying that, it wouldn't surprise me.