Too obvious for me (kinda like Bill Maher). I prefer the humour of The Bonzo Dog Doo Dah Band, Loudon Wainwright III, Randy Newman, and Dan Hicks. Musically? He’s trying too hard to be clever; too self-conscious for me. I briefly liked the We’re Only In It For The Money album. It didn’t wear well.
The problem with calling Frank Zappa a genius is: what term is then left for J.S. Bach? Pat Metheny: "Compared to Bach we’re all idiots".