It's not bad. It's better than a lot of shows I've seen in theme parks, and live music is always a great addition.
Not to mention the performers (especially the male lead singer) seem really into it.
When I look at the line-up of oldie rock bands for F&W, almost none interest me. This, OTOH, for me, would be worth a watch.
Lots of women screaming at Star Lord. Seems there are a lot of moms there who wouldn't mind if Peter was... their son. They'd be so proud.