Emoto - I have trouble with the same thing. No big deal. I don't know show dates and venues either
Regarding Donna vocals, I thought that conventional rumor had it that after the Wall of Sound, i.e. like 1976 on out, Donna did not use a stage monitor. So she did not have the mix of the music to position her voice in/with/against. To me she sounds better overall in the years when the Wall of Sound was there. Remembering of course that part of the design concept was to provide a mix of sound from behind and you did not need stage monitors. On albums for JGB, etc. she would have likely use headphones in the vocal recording room, thereby providing the necessary feedback for vocal intonation and thus sounded lovely. Maybe she uses in ear monitors now or regular ones? Or has just gotten that good w/o the use of monitors. The bands she sings with now are playing less loudly and smaller venues, imo. But I am probably just prattling.
I started seeing them in 1976 also and I really don't remember hearing much about Donna's singing, at shows or around the community that I knew back then. Just part of the Grateful Dead and accepted as that. Now in later years, listening to tapes, etc. the guys I shot pool with for years used to cringe and make uncalled for remarks during PITB aka Playing In The Band. I never like that. She is a fine singer and had off nights and on nights. Maybe more one than the other if the old rumor was true.
I dunno. Musician bashing is not a discussion I like to participate in. So this is just an observation and what I remember from my experiences with the band and their recordings.
Fretful Dave