IMO a trainer should be controlling the future of the fighter before the promoter. Who knows the fighter's abilities more than the trainer? I would bet money that if a guy is a world class trainer he will know how the fighter's style matches up with different styles, and what he can handle in the ring better than any promoter. However, this is a new relationship, I doubt Roach knows Khan quite as well as Warren yet, and promoters do play a large part in the decision making, but to ignore Roach's opinion on what/who Amir is ready for would be foolhardy.