Kansas, Tech and oSu have plenty to offer the PAC-12 (especially after USC moves to the $EC). Merging with either the I8 or the B1G will not be enough to keep USC if the decide to move.Big 12, the remaining 8, have nothing to add to the Pac 12.
As bad as everyone thinks the LHN is, the PAC Network is a dumpster fire with no real network supporting. Half of the offerings are not even in HD.