This will start up the 'black managers discriminated against' debate again. We will again have the usual couple of suspects dragged up with the questioning of why Ince and Barnes never made it into higher manager positions [with insinuations that it is down to race and lack of opportunity], and not the fact they were both crap when given the chance.
No one has the balls to say that higher profile ex players as a whole rarely make the transition to effective managers. The good managers tend to come from the 'second rate' stock of footballers, if they actually make it at all.