How about you learn to read and comprehend at the same time. If you had the ability to read you would have seen that in the post it said flipping the 22nd overall pick for a pick in the 10 to 16 range plus getting a second rounder. That's a significant jump with the players available in that range that won't be available at 22. So you aren't just trading him for a second. You are also trading him to move up as much as 12 spots in the draft.
Players like Zary, Holloway, Schneider, Jarvis, Lundell, Sanderson are all not going to be there at 22. Don't kid yourself. Buchnevich is never bringing back a first rounder. NHL GM's aren't stupid. They understand that with Lafrienere, Kakko, Kreider and Panarin in the fold Buchnevich is on the outs. I'm also quite sure they are aware of Kravtsov now breaking out. So any leverage the Rangers had on Buchnevich is gone to the rest of the GM's. Defenseman are a lot more valued like Skjei around the league than headcase wingers who sulk when they can't score and take stupid penalties consistently.