I've seen him at odd whiles over the years on PPV and music channels, and he still seems to put a lot into a live performance. I would definitely go to see him in a smaller venue (500-1000 people theatre-type) gig if he was within about 150 miles.
I remembered when Frampton made an appearance on Baa Baa Black Sheep.....LOL.
The sudden rise to fame and fall would have ruined a lot of other people, but Peter took it all in stride and just kept playing.