The Hendrix album is an interesting example. It has not gone without criticism, as some diehard fans have been critical of the way it has been marketed (being presented sometimes as a cohesive new album he was working on, when it is actually more a random collection of different jams; and of the fact that most tracks are already known, albeit in alternative versions, by diehards). Still, these issues are of course of a totally different calibre than what we as MJ fans have encountered ever since Michael passed, and overall I think it is a collection that was put together respectfully. His work was left untouched and, although known to some extent, offers diehards alternative versions of songs they already knew, and exposes casual fans to a whole disc of authentic material they probably have not heard before.
The reviews have also been favourable and contain the sentiments which I would love to find in reviews of future MJ releases, e.g.: "No one knows for certain, but this latest collection offers a tantalising glimpse of how Hendrix's genius might have progressed," "People, Hell and Angels offers the clearest sense yet of how Hendrix was preparing an evolution of his own," etc.
I think the album is also an interesting example of how it is possible to do quite well commercially while still respecting the artistic integrity of the artist. The single "Somewhere" hit #1 on the Billboard singles chart and the album made it to #2 in the Billboard 200 album chat in its first week. Remember that Hendrix has been gone for 43 years, and died when he was 27, only in the early stages of his career. Also keep in mind that this new Hendrix release is his 10th posthumous studio album already. Yet, despite the fact that they have much, much more to work with, the MJ Estate apparently cannot get something like this together.