You made some valid points Scott but one thing you failed to address money wise is the fact that with a larger, broader user base we have more to offer potential Vedors/Sponsors.
I loved TR when I first joined, it was fairly small and close knit. It has changed and evolved just as anything will and I still love it. I've had to change my browsing habits to compensate for some of the newer members and some of the newer posting habits in FFA, but I'll take that if it means a larger, more active board. FFA is just that, Free For All. It's a place to go and discuss other things non car related. It will always have more posts and activity because anyone on the site can go in there and post something. It's not the same as a Tech forum or the Auto-X/Road Race forum that is more limited.
Growing in size can't hurt the site as long as we maintain a focus on Cars first and FFA second. More users = more Vendors/Sponsors = more money = better, cheaper events in the future.