Thanks for pointing that out, it's been tickling the back of my brain, too.
BGSU were a decent-looking team Thursday night. Sure, we beat them by 30+ points, and sure, they're smaller and slower than us. But so are most teams in their home conference (the MAC). They might actually have a decent season this year.
Their next opponent, South Alabama, was 4-7 last year, and is in the Sun Belt (weakest of all the G5). Murray State is Div I-aa. Kent State, Northern Illinois, Ohio, Eastern Michigan, Miami (OH), and Akron are all peers, and none lit it up last season, either.
Last year was a tremendously odd year, the Covid year. So really can't tell a lot from that.
All we know with some confidence is that three of BGSU's 2021 opponents, Minnesota, Buffalo, and Toledo, look to be major challenges.
This team could reasonably end up doing as well as 8-4 this season.
They're certainly not the 128th best team in FBS. They may end up being one of the better G5 programs this year. Will be interesting to see.