Due to finishing 2nd/3rd I don't expect him to be sacked, but would I change him, even if we finished 2nd? I actually would.
The signs are showing (If reports are true) that the likes of Pogba and Martial are not happy. It's the same with Hazard at Chelsea etc.
If Mourinho was to leave at the end of the season, he'd actually leave is in a great position. We have some great attacking players, finished 2nd in the league lets say and a fresh start for the players going into the new season.
What worries me is if we were to sell Martial and/or Pogba this summer as they are unhappy with him, then a poor run of results, along with the typical fallouts, then him being sacked mid season with big players already left.