I'm not going to buy a Hank Mobley set so they'll do a Lee Morgan set so they'll do a Horace Silver set etc. At what point does redundancy become redundant?
I think I will get this set, though, because I really don't have it all on CD, and I want to. But really, from any angle, theirs or mine, this is a lazy man's set. Bill Barron would take some real work, just as Tina Brooks did, just as Herbie Nichols did, just as so many others did, even the Coleman Hawkins set did. You put the focus on somebody with a voice/unique body of work, you gather the material, and then comes the hard part - making the case to the marketplace that this particular body of work, this person and their music matters in a way and on a scale that it has not yet mattered. And then the marketplace convenes and enough people, hopefully, take note, have a listen, consider the evidence and the proposition of matters-ness, and then come away feeling enriched/enlightened about having engaged in something about which they otherwise knew little (or less).
That's why we love(d) Mosaic, not because they repackage shit we already know. Well, ok, that too, but that's not a particularly noble form of love, right?