The board also directed Deaton to explore the possibility of an invitational basketball tournament including MU in Kansas City and to explore all efforts to hold a football game in Kansas City against a traditional regional rival.
Why would they end the border war?
They are trying to save face with the state legislators who are fretting over the 10s of millions of dollars that the State and Kansas City will lose without the B-12 hoops tourney and potentially without the Kansas/Missouri football game played in Arrowhead. They are also in the cycle for the B-12 championship game should they ever get back to 12 teams. The hoops revenue is estimated at $14 million/year and I would suspect that the football game revenue would be several million for each game.
If I am the University of Kansas or State of Kansas I tell Missouri to find other teams to line their coffers with money. Kansas has no reason to cross the border and play Missouri for the sake of revenues for Kansas City.
Missouri may want Kansas to pull the plug on the rivalry so they don't look like the bad guy. The SEC money may look good to the University of Missouri, but the State of Missouri will likely lose more than the SEC beings the university.
I'd also promise them to extend an offer (again) to Arkansas.
A debate on the Misery board is about loss of revenue for the state, and how to make it up. One proposal was a holiday basketball tourney involving KU, and another football OOC at Arrowhead. Neither makes any sense, but really Misery hasn't made any sense to date. They obviously prefer a B1G invite which will never happen!
Translation: the politicians in western MO are adamently against this because of lost sports revenue in KC. The University is now trying to figure out how to placate them with other events, but they won't be able to do so. You can't simply "replace" the Missouri -- Kansas football game, or the Big XII hoops tourney, with some crappy games no one will travel to see. Mizzou's decision will be (already is) caught up in state politics. No one who doesn't understand Missouri politics has any idea how this will play out.