I wouldn't assume just yet that every ESPN covered game across all conference TV deals has been announced. The UNLV game being picked up by ESPN has been known for a few weeks, but that one doesn't belong to any conference's TV rights package. It's treated like a tournament would be, so it's just one game ESPN negotiated with whoever owns that neutral site game. I'm not sure how the Beehive Classic will be handled, but because it's on a neutral site with four teams from different conferences, and nothing has been announced yet, I am guessing it's still under negotiation.
So now they've announced what they're picking up as part of the WCC's TV deal, which essentially means they really only passed on the Houston game as far as BYU is concerned. None of the others would have been viable candidates for ESPN broadcast anyway. For the non-conference road games we still have to wait and see what happens as other conferences announce their TV schedules. I would be really surprised if the Mississippi State game doesn't get national TV if not on one of the ESPNs, then on the SEC network.
Nevada is also a game I would be shocked if it isn't available, but the MWC situation is a little trickier because they have multiple deals. At worst it would fall to CBSSN, is my guess. Same goes for the SDSU game. CBSSN has historically jumped to take a BYU game when they can get it.