A: We would still have the mtn, because that had heavy amounts of advertising dollars from BYU advertisers, as our fanbase was heavily invested in Comcast at that time. Comcast lost tons of subs due to BYU fans bolting when we went indy in 2011. SDSU and Boise would have been happy to stick around if BYU was here and wouldn't have chased money in the NBE, imo. So, maybe they renegotiate the TV deal like they did a bit later and it's a little better with BYU as part of it.
B: I don't think BYU double dealt, there is no solid documentation of it but for the sake of the question, I'll play. If BYU stayed here, that would have left us in 2011 with BYU, Boise, TCU, SDSU, UNLV, Wyoming, CSU, AFA, and UNM. That is an 8 game conference schedule in 2011. In 2012, TCU left. I think at that point, Fresno and Nevada/Hawaii (one of the two) probably would have been invited, and I think the league sits pat as a ten team league. The WAC is decimated and USU and SJSU and whoever is left over between Nevada and Hawaii are either forced to go to D1aa or be FBS independents after teams like LaTech bolted from the WAC. I don't think they bring on enough teams to go to a 12 team league, and they settle on a 10 team league after TCU left and have a 9 game conf schedule. If they did end up in a 12 team league, I think Hawaii and USU (BYU's friends) are more likely invited over SJSU; who has a terrible overall athletic dept.
C: The 2013 team was a pretty good team, and if we make the OOC schedule Texas, Utah, USU, and MTSU as the OOC and act like BYU broomed the MWC; a one loss BYU doesn't get in over Central Florida to play Baylor in the Fiesta Bowl that year. They had one loss to a good South Carolina team by three points and were ranked pretty highly by the end of the year. BYU played a tougher schedule, but the SoS would have decreased significantly playing a MWC. Central Florida was in the high 70s. BYU was in the 30s, but ours easily drops lower if we played a conf schedule here. Our 2013 team would have likely streamrolled this league, but it wouldn't have mattered as far as a BCS game.
2011: BYU wouldn't have won this league. TCU beat BYU soundly that year. Boise also lost to TCU that year, but that was Moore's senior year and BYU would have lost to them too. No BCS game.
2012: No BCS game for BYU. BYU had losses to SJSU, Boise, Utah, and ranked Oregon State and Notre Dame squads. Not a good enough team to make such a game.
2013: See above
2014: I think if Taysom Hill had stayed healthy the whole year, BYU would have had a good chance of going unbeaten and getting in as an at large NY6 game. However, he didn't, and BYU had multiple losses to MWC teams after the injury.
2015: BYU went 4-0 against the MWC this year, and if they were here, they probably would have played SDSU in the title game. However, Houston went to the NY6 game this year, and pounded Florida State; so I'm doubtful BYU would have been in over Houston if we made it a one loss team. BYU was good this year, but not NY6 at large good.
2016: BYU lost to Boise in a close game. The team always played close games, but lost several. They did beat Wyoming. A 1-2 loss BYU team wouldn't have been in a NY6 game over the directional Michigan team that played and lost to Michigan.
So, I'll take zero as the answer. Sorry for the wall of text. This is why I laugh every time someone says how much we're missing out here. It wouldn't be all that much different from what we've had, except with less wins over name teams, less money, dealing with Hair, and other stuff I've explained lately.