The more I read about him the more I like it. He seems to play a 4-2-3-1, which fits pretty much perfectly with our system under Dome and PV, and fits the roster like a glove. He plays attacking, pressing football which is something we've been doing for a while.
Yes he has a CFG connection, but that doesn't mean he's a bad coach. I think this hire will allow us to continue to play the same kind of game we've had for the last four seasons, which should minimize the natural disruption caused by a coaching change. That's important considering we play a competitive game in 45 days or so.
The big difference between Torrent and Deila seems to be that Dome had a lot of formational flexibility -- he'd play us in five different formations over the course of a single game and change starting formations all the time. Deila seems to keep to his system, though hard to see from some of the articles what kind of in-game adjustments he makes.