It's an interesting and bold move. I don't know too much about him but what I hear and read fits well with me. We've been crying out for someone with 'balls' since Lambert left and this guy seems to have serious cojones!
We needed a change of mentality. These players are good enough to win promotion but they weren't playing as a team, there was no togetherness and they lacked a leader.
If he can make them play as a team we'll run the top two close, even with a significant deficit in points. If he also brings his attacking, passing football with him then we'll all be satisfied.
I felt initially the best way to get this team firing would be an old hand but actually, it just needs someone - anyone - who knows what they are doing! I think this guy does but we shall see.