The extra conference game.*
*Not my personal opinion.
Why does a 10 team league require an extra conference game? We could play 8 conference games with 10 or 12 teams. We could play 9 conference games with 10 or 12 teams.
Maybe we should propose expanding to 12 teams and play 11 conference games plus Iowa just to shut up the people thinking 12 teams equals 4 non conference games.