It looks like the retheme was done entirely for marketing purposes, not to impact game play.
By the way, since you mention telling other people about your show, I thought you might like to know that I am the assistant manager at an FLGS here in Tucson, and whenever we have new employees I make them watch your videos during slow times to learn more about the products we carry. So whether you know it or not, you've been teaching online video courses for a long time.
I wanted to mention that my wife (library science student at the University of Illinois) got a notification a few days ago about your online course, so we're already subscribed and will be going through it together. We're looking forward to it.