I believe very process of lucidity by itself is productive no matter what you do. It hones your mental faculties and definitely improves focus. So, no matter what we do as long as we attain lucidity it is productive.

I have not experienced that many fully conscious lucid dreams, but I have had several extremely vivid semi-aware dreams. In these dreams I would usually have an understanding that I'm from a different "world" and that the reality around me is not my native reality, but I won't necessarily realize I'm dreaming. I have swam sometimes in such dreams and had found that I was able to swim in my apartment pool without having ever swam or taken swimming lessons in waking reality. So, I guess that could towards developing skills in dreams in general.