From my understanding, his wife Angie is actually very supportive of Daz and his playing career, so I doubt his play might be declining because of getting married.
It does sound like a lot is going on in his life right now between trying to start up a tour, possible neck pain, and there are some added responsibilities or things to address when married vs. dating or single. The more life hands a pool player to deal with, the more difficult it can become to eat, sleep, and live life between the rails. But if any of us think his play is slacking, I'd say lets put up our money and find out just how "off" Daz really is lol