OK, thanks for the clarification of your word choice. No harm, no foul.
Bday threads going to LJ, I think, was done because it just made sense to put All About Me threads on the All About Me board. HME already has two child boards. I don't think a 50/50 split is that bad. In fact, considering official games come out like once, maybe twice a year, half the threads being fan games seems downright conservative to me.
However, I'm not a regular HME poster so it might be easier for me to say. Maybe one of the board's mods could start a poll on HME for the community to express their wishes one way or the other. I think a strong mandate for the kind of change you propose, from the people who actually have a stake in the discussion, would go a long way.