I think that Meat is at a point in his career where even if everything DID post recordings like this and they DID get illegally shared to hell and back, it can't possibly have any negative effect anyway. He's made all the money he could ever need, already has a reputation as an amazing life artist...having downloads being pirated won't change that. On top of that, there would be very little expense involved (and the little there is would be covered by the people that DO buy it anyway), you greatly please your fanbase, and you also solidify your legacy as an influential, historic live performer. So what if people pirate it? Is it really that big a deal?
If he's worried about people's opinion of his current / post Bat 3 voice, then just put up older concerts. Bat 2 era would be incredible
Of course, at the end of the day it might just come down to the fact that he's just not interested in it. Which is also fair enough and entirely his right. He's the artist, after all :)