I think its more that he now has a far better idea of whats here. Don't forget, when he showed up this team was deep in the crapper. But then they showed they have more than maybe he thought with Green at the helm. Boudreau otoh showed us what the team can be.
He's not going to negotiate against himself in the media re: player value. So of course he's going to talk about guys in a positive way.
The only way Miller stays is if he's OK with something team friendly. I hope he does, but I know thats probably a long shot.
I did like hearing his comments on Bo, and talking to him about growing as a leader (at least thats what I read into it).