I am also of the same mind as the OP. Since all the titles are made under a single, seamlessly integrated system, and all three books are supposed to be equal parts of the the "Star Wars experience", the thought of throwing them all together into one large section isn't too far-fetched. It'd certainly make navigation easier.
Who else would prefer one SW RPG board?
You have my whip!
Unfortunately, it's not the Indiana Jones kind... It's the Cool kind you put on dessert. But it'll have to do.
Actually, I think the betas should stay on their own board for as long as they're betas.
You have my whip!
Unfortunately, it's not the Indiana Jones kind... It's the Cool kind you put on dessert. But it'll have to do.
Ah, the Desserts of Tattooine - delicious. 
Actually, I think the betas should stay on their own board for as long as they're betas.
Definitely agree with that. Keep the Beta Boards separate. The content there tends to be very Beta focused. But other than that, I think things should be kept simple - a Star Wars forum with three sub-forums for each game and a separate General one. The point of all this organization is so that the people who would be interested in a thread find out about it. We're not so busy that we need to break things down more than that to avoid things getting lost in the traffic. And if we did go into more detail than that, we'd hit the point where people are missing things due to too many forums to search.
I'm not even especially in favour of a games master sub-forum. We're mostly games masters here anyway and half the threads on the main forums are games master related already anyway. I never both posting in the Games Master forum myself. If for some reason it's especially games master specific, e.g. a module review or similar, I'll just post extensive SPOILER notices in the thread title as that's more effective anyway, imo.
I too agree on the "betas". Eventually those are moved to the archive anyway.
I like the idea of one GM board and then individual boards for each line. But all under one umbrella Star Wars RPG.
Also, this has already been done. The End of the World gets one forum, with a subforum for the first upcoming game, and presumably extras for the other three games.