My fear is that he's mediocre, they keep him for next year because "upside", and he's bad (as he's been here for more than a year, and in Boston now also). At some point, upside is just something never reached (to be clear, I was believer in giving him a chance this year.......but now I'm ready to move on. At some point, you move on in life).
I'm at that point. YMMV, of course.