Yes he will be. Brandon Saad instantly becomes the best forward on the Jackets roster.
Yeah, just no. Ryan Johansen is one of the top centers in the NHL, he's not the two-way maestro that Toews or Hossa are, but Johansen is definitively better, right now, than any forward on the Hawks' roster not named Toews or Kane, including Hossa (Yes Hossa is an ageless, future HOFer, but Johansen is the better player now). Saad will be one of the top forwards on the Jackets' roster, but Johansen and Foligno are near point per game players (both had more points this season than any Hawks forward), Hartnell is a perennial 60 point guy, and Dubinsky's two-way game is just as good as Toews's, with slightly lower offensive production (look at Dubinsky's Corsi numbers, they're ridiculous). Columbus will have an absolutely brutal Top 6/9. This trade makes them a force in the Eastern Conference, and the addition of Paliotta should not be understated, a guy with his size, skill and skating, along with All-American honors, projects to be a very good 2nd pairing defenseman.
It should also be noted that the big 'get' for the Hawks in this trade was Marko Dano, a young, brilliant talent, whose overall game is very similar to Saad's. He drives possession, and plays with an edge, but his defensive game isn't quite there yet, something you can hardly hold against a 20 year old coming off his first NHL season. This was a good trade for both teams, Chicago got pieces that were more valuable than what they would have received through an offer sheet, and Columbus received two pieces that can propel them to the top of the Eastern Conference.