Happiest guy on the team has to be Dach. This makes sure that Suzuki ain't hogging all the best wingers and that at least one of Laine, Slaf, or Caufield will be on Dach's wing at any time.
Also about Harris, we all know Laine had issues surrounding him, and is basically a cap dump, but for a guy like Harris, you just got traded for freaking Patrik Laine. If he gets back to his early career trajectory, I wonder how much pressure that will put on Harris to perform in Colombus.
*Good luck to him though, I hope he does well and finds a solid role on a up and coming Jackets team in a similar position as the Habs.