You and others can listen to Mark Yanetti’s lies on the podcast tour about the Kings not being worried, but no way do they make this trade if they weren’t extremely concerned.
There also is the other possibility that they may know more about Kopitar's future than we do. Blake certainly has proven that he isn't a victim of sentimentality. They may be preparing for Kopitar not being on the roster after this next season which would leave the 1st or 2nd line center spot vacant yet again. Danault was always supposed to be the future 3rd line center of a hopeful contender. It is still up to Byfield to make or break or else they could be back in the same place in a year's time. A center was needed regardless if Byfield or another center prospect hits or not.