I agree that at the moment there is no need to split the forums any further. At a guess there are around 20 new threads a day ?? with most dying with 1 or 2 days. I've been away for 3 days before and come back to find only 2 screens of new threads, personally it didn't take that long to scan through them.
If there was one new section to be added, then maybe a general hobbies, cooking, etc section would generate maybe a couple of new threads a day.