Nothing of great value is left, besides ND and the state-of-Florida schools.
People sleep on Miami because they've done fuck-all in the ACC, but....you get to play in the most talented county in the country AND Miami's existence prevents some talent from Dade & Broward counties from going to SEC schools. Some percentage stay home, and it's a defense against the SEC's rich getting that much richer.
What the Big 2 should do is when they add a 'plus' program, bring with it a 'have not' program. Keep things balanced, keep the big-boy programs with fanbases used to winning to enter the conference with a cannon fodder program.
And as I've said before, there is hope, in that the Big 2 get big enough to split into regional, conference-sized divisions....it's our only way to go back by going forward in a realistic manner.