FWIW, none of the tracks from Basra were penned by Joe — in terms of why nothing from that date was included in the “sideman” tracks ‘extras’ at the end of disc #4. (Everything there is a Henderson tune.)
Yes, the BN leader sessions from the 60s and there’s a lot of them. Maybe the problem for Mosaic is that it would be a big box and they’re worried whether it would be too expensive. Conceptually, it’s not much different than the Henderson box, just more of it.
What about a Blakey box from the 50s. Wouldn’t that be popular?