Fwiw - I read the forums by checking the Unread Posts function. I don't know or really care where a post appears. Changing the organization of the child boards, or where specific things are posted would have absolutely no effect on how I use the forums. I imagine there are quite a few others who do as I do, by placing specific boards on Ignore, and reading everything else.
Reorganizing the boards is a pointless exercise that gives you a good feeling, but accomplishes nothing whatsoever.