I don't think he can stay in post.
He is not a better option than us bringing someone else in early in the summer as the simple fact is that we'll be starting the season with zero confidence. We lose the first game and that's it he'll be hounded out. We'll inevitably keep him on for a dozen games, get rid and then the new manager 'not having his own players'.
We need to start a fresh, at the very least to cut the new guy some slack at the very start of the season.