Seems a bit of a shame, after he'd gone on record as saying he was very keen to write more lyrics on the next album. Wonder how that went down.
One of my favourite things about Petrucci Theater is how every single band member has a voice. Rudess is no longer the "hired gun," John Myung has a lot to contribute, and Mangini is set to absolutely floor us in drum world this time round. Brilliant to have JM back in the lyrical mix, but it's a bit of a shame that James hasn't had anything to add this album, for whatever reason.
ETA: Aha! Thing's loaded. It's cos he just did his solo album. That makes sense. Excellent! I'm happy with that answer.