Another thing is that most of these choreographers have been trained in contemporary and that's their forte.
Now, I am not saying that emotions and songs can't be represented by dance forms such as hip-hop, ballroom, classical etc. But it's risky and it takes a great amount of effort to put such choreography together.
Of course things are getting repetitive with the constant blend of contemporary in everything but I think that the choreos are playing it safe and easy.