As succinct a description of current events as possible, well done.
I'm not at all surprised that this looks like it's going nowhere for now. Too many parties who want too many different things, they're never building a consensus on most of this. The SEC wants a hard cap and is silent on the 19-member cap. I think they really just want a system where they usually win, and a hard cap only because then they can outspend everyone the old way. The B1G wants . . .something, but nobody really knows what. While they say they want self governance and antitrust exemptions, they pretend to want salary caps and don't want limits on conference size. The ACC schools want out if they can get out, and no limit to movement. The B12 wants its members to survive as P4 schools- but really, they just don't want anyone else getting further ahead of them. ND wants to maintain independence and doesn't really care what anyone else wants. And the G6 want the illusion of being able to compete.