Cutting down the number of forums (and using sub forums to tuck away grouped content) is deliberate to ensure new users aren't confused as to where to post. On the old site we had dozens of forums, and a lot of crossover.
It was getting to the stage were you had to wonder whether a post about earning miles should be in General, Flying Club, Ask A Guru or one of the other forums. It's much more straightforward here, and the new quick links to 'new posts', 'unanswered posts', 'your posts', etc, should make it quicker to navigate.