I think Canes fans would have said why would we target a center when we already have three and have moved necas to wing. Why would we spend those assets (regardless of value) on a position of strength when we need help on the wing?
Well, speaking as a fan of the Canes, I think we do need a good future 2c as that is missing in our prospect pool. Yes, we do have Trocheck currently at that spot, but he's UFA after this year and unless he REALY wants to be a Cane, I suspect he will price himself out above what our management values him/that position at; just like Dougie priced himself out of the 2/3 D position management saw him at.
So if that is true about Trocheck, who are our center prospects that might take the 2C spot in the future? Suzuki maybe, but give his eye and development to date, I think he projects more likely at a 3C upside. Drury is in the same boat, though I think he may be the better of the two, or maybe just more developed at this time. Jarvis is probably our best prospect at this point, but he is really more of a wing. Some think Necas could slide to the middle, but I think he is better suited at the wing given his speed. So KK becomes our best prospect/young player that could take the 2C if the Habs don't match. And even with his slower than desired development to date, I think that is a pretty safe conclusion.
So now, why spend the assets to get him if not for the revenge factor? Well, if you think he can do the 2C position for a good chunk of your future (they seem to think that and I agree), and if you think the price in assets is fair (if he can play 2C for the time frame they want based on the rumored extension of 3 or 4 years, those assets will be a bargain assuming they are not lottery picks), and you think you can pull of the acquisition (Montreal put themselves in a pretty unique position to make it possible by alienating him to some degree, failing to sign him quickly, and having a very tight cap situation, so I think there is a good chance) then the offer sheet attempt makes all the sense in the world.