He's never going to do it.
1. Don't think he's motivated to train for mma anymore, and he never really was that hard a worker to begin with.
2. It's always very assuring for lazy people to hear; "you would be so good if you just applied yourself". He could always fall back on lack of motivation or cardio for his losses. If he had a world-class training camp and partners and he still loses his next fight he would have absolutely no excuse to fall back on.
Don't get me wrong, he's obviously a talented fighter, but perhaps he's not as good as he always thought. Besides cardio he always seemed to miss certain qualities that make a fighter truly great, things like tenacity and the ability to adapt during a fight.