The clean tone on my Majesty is great. I've played lots of JP's and the clean sound has always been good. It is definitely overlooked when people review/demo the guitar though. I used the Majesty exclusively when I played West Side Story this past summer. The guitar part is just "clean guitar" -- probably a jazz box or semi-hollow as most of the single note lines are Jazzy-bop style. I just rolled back the tone a bit, and lived on the neck pickup. I can't decide if I like the JP split sound or the middle position without the split better. Good thing I can get both!
The piezo is great, but it's even better with my Helix and IRs. JP uses a Fishman Aura pedal to refine his clean sounds, and that's pretty much what I do using Helix.