His leaving North End left a bad taste, all about how great Sunderland were, massive club, unfortunately for him he wasn't good enough for them, leaving him looking like a prick.Sunderland job (and that documentary) probably aged him 20 years.
Good manager, better than his record over the last few years suggests. Definitely needs a bit of time out.
No feelings for Grayson at all, wouldn't even consider him as a back up to ST.