Thanks for the comment, but I doubt that we'll do one for DxO. It takes a huge amount of effort to do these tutorials (especially on the part of Chris, who does the many weeks of editing required), and unless there is a large enough universe of users to purchase it, the economies of production don't work.
Also, we need to have an expert in the program to help do the training, such as Jeff Schewe for Lightroom / Camera Raw and Photoshop, or Walter Borchenko for Capture One. I know if no one with a similar expertise in DxO.
Michael