The split was in summer on 2011. Since then, he defeated Cain and Frank Mir looking very good. Yesterday's performance has nothing to do with him leaving Ed Soares.
And as far as I know, he continues to train with the Nogs, with Luiz Dorea, there are pics where he trains with Feitosa, there is a video of him sparring with a silver medalist olympic boxer. He has good trainers and has good camps.
It is just that yesterday he was not himself.
As for his comments of KOing Klitshcko, sometimes JDS says somethings kinda arrogants and out of place. But I think it is not because he is cocky, but because he has an extremely high confidence in himself.
This defeat may humble him a little bit, he is great but not invincible.