Well when things weren't going his way, he just quit. He also just makes excuses for his losses and doesn't really give much credit to neither Gonzaga nor Kongo.
Well he's said himself that he is coming back to the UFC. Either way, if and when he comes back, I'd like to see him lose.
He didn't quit, he went to fight where he ws happier, where he will be wellpaid, and promised to come back.
He will come back, I presume, only if he wins his fights in Japan.