His results are decent but then Avram Grant did well at Chelsea as did RDM for a while. It seems more a case that the players at his disposal are good players and will win games on the strength of that rather than any tactical input from him, eventually they'd get found out like RDM at Chelsea. Particularly concerning is the fact that Spurs were thrashed by the better teams, its all well and good beating teams he has a much better team than, its his equals and betters that he needed to compete against. Given there are no teams in this league who we are much better than, that'd be a major concern.
Spurs fans also really don't think much of him and think the football is often poor. If he's to be a decent manager he needs to go away and get his coaching badges and then start below the premier league.
The one manager I would like to see us go for is Eddie Howe who's done terrific at Bournemouth but he'd cost more than nominal compensation I should think so that's an unlikely one.