Thanks for all your replies!!!!
I'd be really interested to see / hear the original recordings of Stevie at the TITN show... I guess I will now listen to some bootlegs of that tour to hear if her voice was really that bad during this period
Concerning The Dance, I'd never suspected they cleaned it up in the studio that much as some of you say. To me it doesn't sound very polished... but then again neither does Stevie's HBO concert - but I found this:
https://www.youtube.com/watch?v=0SgJgVqI0ZY
I'm totally ok with editing live stuff, for example splicing two versions together to get the best performance. But I think I'm a bit sensitive to additional overdubs and rerecorded vocals. That's not live anymore at all.
It's probably because I'm also an Elvis Presley fan and all his live recordings that feature additional overdubs sound rather strange to me. His live albums were overdubbed as early as 1969, btw. So I guess it was common to do it even then. With so many EP collectors' releases available it's an easy thing to compare the originally recorded versions with their overdubbed counterparts, btw.
It would be great if we were able to do that for The Dance!