Well, it was better than I expected to be honest. The Chain wasn't a song I thought would work very well, but I enjoyed it. I think TV studios are often poor for sound quality for live music, but it sounded OK to me. I've not watched Gypsy, but I don't care much for the song anyway.
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).