Last year, I wrote a tactical post about powerplay formations and how the Senators like to utilize the 'hybrid' formation depending on who's on the ice, as it allows Erik Karlsson to basically do what he wants.
One of the things I was worried about when the Senators changed coaches was that David Cameron might do things differently. It was a huge topic this season, mainly due to a porous, unlucky run where the Senators failed to score mid-season and ended up causing a lot of overthinking on the coaches end. The personnel is likely to be the same this year, with the only change being a freed-up spot due to David Legwand's departure.