This is a bitter sweet announcement. On the one hand, I have all of this material on individual discs;on the other hand, I am glad for any new Mosaic Box and will pre-order this one without fail. It was the classic '60 and '61 records coupled with the earlier Mosaic Mobley set that got me interested in these later sessions to begin with.
The value of this set for me is contextualization and, as it was so well put above, "the respectful presentation" of the material. Strangely, I was in a similar position with the Ellington 1932-1940 Brunswick, Columbia, and Master Recordings-that is to say, I had all of it spread over various discs. Nevertheless, the Ellington set became one of my all time favorites despite my lack of initial enthusiasm.