You're not far off but there is an easier explanation.
The committee simply ranks the teams each week on whatever criteria they choose and as long as a team keeps winning then nobody complains and their ranking is justified. Plus, all the committee has to do, to any naysayers, is to say, "just let the games play out and it'll prove itself out."
And then, when in the last week, when everything hasn't righted itself or proven itself out, THEN they actually have to argue amongst themselves, use data, cuss & discuss, talk about the "eye test", etc in order to come up with an accurate order of 6 teams that can be justified by the written standards.
And IMO, their latest order/ranking makes sense to me.
With 1 exception...UGA is one of the best 4 teams in the Nation and should, at least, be ranked 5 with Noles at 6.
So if there's any ruse going on, it's that they tried hard to keep 2 SEC teams out of it.
And if there's any validity to your point of them being capricious until they finally fall to the almighty dollar, it's proven by allowing TX into the mix over UGA.
Because the "4 best teams" are UGA, Bama, Wash & Mich.
But per their criteria (ie Conf. Champs, SOS, and availability of players...they nailed the final 4.