It's a bit much to dismiss anyone who didn't like it as whiners and moaners. My wife (no loyalty) thought it was terrible and out of tune, and my sister (big Mac, esp Stevie, and Crowded House fan) thought it was a car crash, and neither one of them have any loyalties to LB. Sometimes it's just personal taste. I think The Chain live is one of Buckingham's great vocals, so it was a brave choice. As I say, I enjoyed it - not enough to spend £100+ if they come to the UK, but I'm glad they sounded good together (to me).
I think if you'd been seeing Fleetwood Mac's twitter mentions the last few months, you might know what I meant. People are acting so entitled, as if they're owed something and FM has betrayed them personally, knives out long before there was even anything to criticize. Almost as if they don't realize, if they're unhappy with it, they can just do something else. Instead they've chosen to spend months spewing skepticism and bile toward anything FM-related. It's like, alright people, go ahead and cry yourself to sleep every night and leave the rest of us alone.
I also don't understand why anyone would think this particular performance was a "car crash." I'm a musician and the harmonies were no more out of tune than the vast majority of live performances (Neil was totally fine to my ear). Perhaps FM is usually better live; I wouldn't know. I DID think Stevie Nicks was a bit pitchy for Gypsy. But overall, as a band, I thought it was pretty solid and far from a disaster.
But anyway, a lot of judgments are being made seemingly without any consideration for this being a premiere performance. I've seen a lot of "low energy" comments; surely Neil and Mike are feeling a bit conservative with their stage presence at this point. They're the new guys in an iconic band and are understandably hanging back a bit. Et cetera.