I have never had the privilege of hearing Diana Krall in concert, but I have (and enjoy much) several of her recordings. Do I enjoy as much as Nora Jones, Sarah Brightman, Allison Krauss, Jane Monheit, Jennifer Warnes etc, etc? Not sure I could ever say, as I enjoy and appreciate each in their own right.
I always loved the music of Eddie Rabbit and was overjoyed when we (wife and I) received, for his local concert, a special invitation which included front row seats and back stage passes, through the local radio station that we did a great deal of business with. We were a bit disappointed in the overall performances and in getting to meet him back stage as he seemed a bit withdrawn and eager to depart from the small group. I learned a short time later that he had not been feeling well and it was not very many more months after that, that died of cancer. I now have an even deeper love of his music and an appreciation for the fact that he was even there for the performance.
I believe the OPs post is very tasteful, with a legitimate amount of concern; we sometimes really don't know what's happening behind the scenes.
@n80 Thanks for reminding us to be civil.........Jim