I'm kinda happy with this deal in the sense that it's the first big one that gets the ball-rolling and the price wasn't a 1st round pick+ and it gets the most sought-after UFA d-man off the market. I believe it kind of sets the market with more reasonable prices.
As far as a division rival getting better, there's no doubt that they do but at the same time - I don't think it makes them THAT much better and here's why :
If you listen to most flames fans and local pundits, they'll say ->
Hanifin is awesome
Andersson is awesome
Weegar is awesome
Tanev is awesome
With Markstrom having a great season this year - you would think that having such an amazeballs Top-4 must mean that they are one of the top teams in the league... not even close, they are unlikely to make the playoffs after they trade Hanifin. Is it Denis Gilbert's fault ? (Probably) Their team scoring is middle of the pack with 185 goals for (17th) so then what gives?? They are terrible on the PP (30th) but great on the PK (5th) so essentially, they should be winning close games on a regular basis.
Personally, I believe that the players listed above are overrated by their fans and by a lot of people. Improper slotting is an issue and I'm not sure there's a bona-fide top pairing D-Man in that bunch but more middle-pairing guys.