This was my initial reaction as well, but Kessel is under contract at a good cap hit for the next 4 seasons. The qualms I have are:
1.) When is his play likely to fall off? He's kind of a freak so I wouldn't be shocked to see him live up to his contract for the duration, but it's hard to say.
2.) Who do we play him with? Ideally he'd be with Granlund, so do you switch Granlund to LW and play one of Zucker/Parise on the right?
Maata's skating worries me as well. The overall mobility of our blueline is a major strength right now, and I'm not all that comfortable with either Maata or Seeler taking Brodin's minutes.
I don't hate it, though.