I have long maintained Tumbling Dice is their best song. And you're right, making it seem like a song that went through so many iterations sounds like it was tossed off late one night is no easy feat.
To me, artists are almost always right when it comes to stuff they release. Stuff in vaults and alternate takes are fun for the hardcore fan but don't often make you think it should have had widespread release at the time. Live recordings can be of some value especially to Jimi junkie like me. (The Who have also released some terrific shows from their onstage prime.)
