Interesting data and talking point.
One thing to consider is that up until 2016 the B1G played four OOC games versus the three they do now. It may not seem like much, but that's roughly 8% of a 12-game schedule.
Both from 2011-2014 and from 2018-2019 the division won 69% of its OOC games including bowl games.
From 2011-2014 the division won 50% of its conference games, the number is only at 51.8% for 2018-2019 even with Nebraska falling off.
You can't argue with what happened, but assuming the 69% OOC winning percentage held and the teams were given that game, it's fair to say that the division would have won an extra 8.28 combined OOC games (1 OOC game for each team x .69 win probability x 6 teams x 2 years) giving it an adjusted record of 95-60 and a winning percentage of 61.2%.
It's probably fairer to take the average of the OOC winning percentage versus the conference winning percentage (68.9%+51.8%/2 = 60.35% win probability) and the combined adjusted wins would be increased by 7.24 games for an adjusted record of 94-61 with a winning percentage of 60.6%.
Or do nothing, but I just want to point out that the B1G is now playing three OOC versus the four they used to.