I’d say there is no universal stance on his tenure. Some people loved him, but by no means everyone. He’d still be at SPS if everyone thought things were rosy. There are things I’d praise him for but I also have things I could criticize about his tenure and leadership. However, I’ll just wish him and his wife best of luck and a good career at Kent. They are good people with good intentions and hearts.
ETA: I would NOT want a head of school job, for various reasons, despite the fact that they can be well paid.