Fell out with too many players to make it tenable to continue I'd imagine, thought he would make end of season but Levy is known for pulling the trigger. Had Spurs going well start of the season, but Jose being Jose he eventually rubbed too many of the squad the wrong way.
Mason as the caretaker until end of season, then anyone's guess, Scotty Parker, Benitez, Allegri, Nagelsmann, Rodgers, Ten Hag?
Levy will want an attacking coach that will work to bring youth players through. So Pochettino v2.0.