I'll add that a big reason for Seattle's success is their ability to outscore their defense and goaltending problems.
They have added offense-first players like Sprong, Donato and Tolvanen on cheap contracts and those 3 combined have 27 goals, 22 assists and 49 points.
I'm skeptical about how much those players will benefit a team in the playoffs, and if you're a contender you can be picky and choose to have a bottom 6 filled with more defensive-oriented players, but we're not at that point at all.