By the way. Rafa please go get married dude, knock up your lovely bride to be and come back in a month to Cincy tournament with the attitude that someone is trying to take food from you new family's table. Then you can win 3 more non clay grand slams titles.
Marriage won't do anything. It's just a signed paper - they are probably already living together or close to it. Nothing substantial will change even in his personal life.
What Nadal needs is changes to his tennis. He's fine mentally. Djokovic and Federer have improved and Nadal hasn't at the same rate. It's as simple as that.
Look at Fed's backhand. He's never hit it better even in his prime and it's dominated Nadal and even Djokovic to an extent. Djokovic's serve is bigger and better than it's ever been. His net play has improved and so has his forehand.
These guys hired new coaches, data analytics gurus, changed equipment and adopted new strategies. In Nadal's case, it took him forever to change to Moya, and even Moya hasn't done anything innovative. Djokovic hired top players (Becker, Goran etc) as coaches, Fed hired Ljubicic and Nadal hasn't done anything similar except hiring someone who can speak his language. Not a world class player or coach. Fed switched to a bigger racquet frame, Novak changed the weight of his racquet and companies as well. Nadal didn't do anything and lacks power sometimes.
Furthermore: Nadal used to serve well in 2010 and even in 2013. But that serve is AWOL. His serve continues to be a liability. He continues to persist in returning waaay far from the baseline even on grass. I've never seen him return as badly (in 15 yrs) as he did against Fed in the Wimb SF. So with a (relatively) weak serve and a relatively (weak) ROS - he starts every point at a disadvantage. He has to rely on his ground game to somehow get to neutral, but even that starts to fail under pressure - as his backhand spectacularly did against Fed in the SF.
So no coincidence he is 0-17 (or something similar) vs Novak and Fed outside of clay in the past several years. Rafa won't win more non-clay slams unless he makes some big changes. Hoping for luck of the draw or for these guys to slip out of form - is not a strategy..