I like it for both teams. Carolina takes a big swing, it's a risky play and they paid a lot, but it could pay off. They weren't getting it done with the previous roster, they needed to try something and this is a big boy try. Colorado sheds some salary, gets some picks and two players who could be useful to reinvigorate their lines throughout the lineup, and opens up a way for a bigger trade if they decide to go for it. Not sure I buy into the whole Crosby idea but that would certainly be intriguing, or they could go after a smaller piece to help propel them to another Stanley Cup. It's not a bad gamble on Colorado's part, if nothing else they get the picks and kick the can one more year (extending a player, now Necas).
Obviously as a Finn the Aho-Rantanen connection is very exciting.