In the past I would prefer them do albums in a way they can replicate them live, especially the vocals. Now I'm all for making a fucking great performance that will stay forever and do the best you can with it live, even if it's not the same. I was so extreme about it that I went to the Judas/Queensryche tour in EU many years ago and left after Queensryche finished their opening performance. I wasn't a smart kid lol.
I can be the same way, depending on the singer. I saw Priest a year and a half ago. Rob had just turned 71. I wasn't sure he'd be up to it, since I've heard a lot of his struggles on youtube videos over the years.
They started with Electric Eye, and he sounded great. Went into Riding on the Wind and he struggled, but I gave him credit because that's a really hard song to sing, and I'm used to his vocals on the live Halford album with that song. I was really happy to hear it live. You've Got Another Thing Coming - an easier song again.
They got to Jawbreaker, the fourth or so song, and he sounded great throughout. At the end, he unleashed those ending high notes: Jaw
BREAAAAAKER! The place went apeshit and cheered loudly. I was floored, and did not expect Rob to sound so good there. From that point on, he was amazing. Screaming for Vengeance was another one where he didn't sound the best, but he is more than willing to give these songs a try and do his best. I'll take that any day over someone like Vince Neil, who is out of shape and has never tried to be the best live singer that he can be.
He just talked about setlists in an interview and said that he has to remind Ritchie to structure a setlist to give him a few songs to warm up. I can see that being truthful based on my experience.