Ed--I think I am in general agreement with you--I think conservatives in increasing numbers are finding other ways to spend their mission dollars than supporting a denomination that they feel--rightly or wrongly--is out of step with their mission concerns for the world.
Baptists, because of soul liberty, know that they alone bear the responsibility for making decisions about which associations will serve the Kingdom and which won't. So they know their responsibility to steward their money as they understand God wants them to, and one cannot fault them for wanting to put their money and efforts elsewhere. I do think that in an effort to maintain a total lack of theological boundary in the denomination, the ABC is of course losing many many dollars from conservatives who feel the need to steward it more wisely.
To me that's a far more likely reason for the $ shortfall than the idea that there's a whole bunch of people out there who would just love to join the ABC but don't like the infighting.
Still, like Tim, I would like to discuss the issue at hand. My impression--again, I'm not a legal scholar--is that this proposal makes no pretense of representing the majority of American Baptists. Instead, it leaves the future of determining and proclaiming ABC identity in the hands of a board of thirty people, eighteen of whom are chosen by a national nominating committee--and of the 12 people on that nominating committee, 8 are already on the board of thirty people. My wife is a mathematician, but even I can see the odds aren't good for that group to experience change--it can be entirely self-sustaining and easily suppress any dissenting view of the denom.
So my advice, whether you're liberal or conservative: if you want to have a say about the future of ABC identity, better get on the Board of General Ministries now. Odds are if you don't, nobody who thinks like you will anytime soon.
Again, just my $.02 and would like to hear other's thoughts on the document as my vision--and especially my by-laws-interpretation--is far from inerrant...
Mike