Sounds crazy, but here is why it would work:
He brings out the most offence out of players, like in 05-06 for example. Joe Thornton put up 125 points, Cheecho put up 56 goals!
Ovechkin plays best on a rush attack, similar to what Wilson was doing that had Kessel on pace for 50 goals.
I think that we would see Ovechkin and Backstrom put up huge offensive numbers if he was the coach but I don`t know how far that would take them in the playoffs, he isn`t known to be a good playoff coach.
Also he coached in Washington for 5 years.