I'm not surprised. I am surprised that he'd want to go to such a destination though.
He gets a young team he can mold from scratch, he'll get autonomy over say-to-day call-ups and decisions (Murray often leaves Buffalo to personally scout players, and it's noted that Babcock didn't like Holland deciding which players got call ups and which ones didn't), and they can give him more money than God.
Really, after seeing how hard the Pegula family went after Rex Ryan it shouldn't surprise anyone that they'd do whatever it took to bring a rock star hockey coach to Buffalo as well.
The Sabres worst days are behind them. They paid their dues and are now preparing for compete mode. Eichel, Reinhart, Ristolainen, Girgensons, Zadorov, and company would make any coach's mouth water.