Wenger did alright, Mancini seems to be doing ok...Rafa didnt do too bad and I guess Mourinho did so so... All big clubs with lots of money...not too many have done well at the smaller clubs though, or I am struggling to recall any.... I actually think he would be a good appointment...very good technical player so would probably suit their current setup edit - take your point about ex players though...Gullit or Vialli?
Its a gamble, will he do an AVB or Wenger. He doesnt have a record of staying at a job very long. He hasnt lasted a year at his last 3 jobs so I wouldnt employ him on that.
They'll do better getting a manager that can work with what they've got rather than bringing in a domestic manager that would have them play a different style. Gives them a fighting chance IMO.