With Derek being such a huge talent in dancing and choreography, putting him with a low level talent could be too stressful for the lower level individual, and discourage that individual. They give him partners who can "hang" with him, even though they are not really at his level either. And, I think, they have the desire to work harder to show that they can, indeed, dance with him. When I'm new, I don't know that I want to, immediately, be with a master, but maybe I'd rather come along in smaller increments? He's worked hard to get to where he is...along with whatever God-given talent he possesses. Who knows? Maybe they'll add a little "shake-up" show and put the stronger pros with people who've been on in the past but did not do very well, but have shown that they really are interested. That could be fun.