Frankly, I love how it's set up. For me, my true "fanboyness" with Star Wars and with Lego came concurrently; I was just an average fan of Star Wars, then I got the MTT, which brought me out of my Lego dark ages, and then I found Wookieepedia, which allowed me to read up on the vehicles I was building, which made me want to buy more, ad infinitum. So, I like having the one place to chat about those topics. I don't really want to join an actual Star Wars forum, because I just don't have the time to eat up all the EU stuff the way I know some of those fans are.
I think that ultimately, if you registered for this site, you are both a Star Wars fan and a Lego fan, so those things shouldn't be an issue when mixed together. The only other thing that I have to add is that while I see why the other 3 forums are split the way that they are and it's no biggie, I could easily see Liscensed, Original Themes, and General Lego being combined, as they are basically what encompasses all non-SW Lego.
"Always carefully check the source of your internet quotes" - Abraham Lincoln