Do we need Buch's numbers to improve? Remember, we need depth also. If you believe that both Laf and Kakko are future top 6 players, and Panarin is obviously in our top 6, that leaves one of Kreider and Buch to eventually drop to the 3rd line. As long as we can afford it, that's not a problem. Maybe at some point we'll need to move one of them, but that point probably isn't today, despite our current cap issues. There are other ways to address that. If Buch's numbers don't improve, he's isn't going to get a significant raise. If they do improve, he'll get more, but that's still a good problem to have. We'll have more cap space next year, and if he improves his numbers, he'll have more value then if we decide to trade him.
Tampa signed Miller to a 5 year deal and traded him a year later for a 1st round pick. His numbers at the time were no better than Buch's. Granted, Miller was a year younger at the time than Buch will be next year, but I don't think that will significantly change his value. Not enough that we absolutely must trade him now. He finished the year strong and is still on an affordable contract. Let's have some patience, instead of worrying about maximizing the value of every asset.