You pick out BSU as your G5 example but they are the exception and not the norm. Also, that is likely to change with the MWC's next TV contract.
Regarding opponents, we have 5 P5 opponents in 2018, 4 in 2019 and 6 in 2020. That would have to be cut down if we joined a G5 conference. Also, we can pick our G5 opponents from any G5 conference and not be stuck playing Wyoming every year. It's one thing to play a San Jose St occasionally but most definitely another to have to play them every year.