I've also noticed that what side gets more activity tends to run in cycles. For the most part, I'd say the healthy amount of activity on Reds Live demonstrates that we don't have an us vs. them system. ORG's just around to weed out a lot of metaposting when folks would rather talk about baseball.
I don't start a ton of threads, but when I do, it's always on ORG because I want to kick around the meat of the issue. When a major move gets made, I generally post in the ORG thread too because that's where I find the deeper analysis occurs.
IMO, just the act of having some visible standards helps matters.
So if people think the game threads would benefit from a split then I say go for it. There will be an inevitable flare up about it this summer (as membengal said, these things are predictable), but that system worked last year.