Like I said, might be best to wait (btw had to google "raison d'etre"), and as for the rest: i just enjoy complaining so pay me no mind.
The separations of sub-forums is putting bets for the future. Right now it might not make a ton of sense, but as numbers/comments/participation grows so too will the need for organization. Either wait until its a huge pain, or change now and risk looking silly for having an empty sub.