Just read through some pages of the Celtic message board linked in the OAM article. Even the fans that don't think he's particularly good are praising his work rate and attitude. Many are saying he would be best utilized in a high press system. Those fans believe he didn't succeed because of lack of regular playing time, poor coaching, and lack of a defined team playing style. Seems like the "right fit" to me.
I know the saying, but this time around I wouldn't mind the devil I don't know.
The other thing I keep seeing Celtic fans say is that he is a better fit for a two striker system. It seems like there's a lot of circumstantial evidence to suggest there's reason to believe he is a much better fit for us than Celtic.