I don't know who they scrimmage, coach. I'd gladly substitute BC for Mitchell as well.
The last 3 years, BNL has performed well against Mitchell in the scrimmage, and in my opinion, gained an unrealistic sense of ability. We meet up with Martinsville in week 1, and it takes us 2 quarters to get acclimated to better competition. We play catch-up the rest of the game.
The talent gap between OV and Martinsville is smaller than the gap between Mitchell and Martinsville (even in OV's typical mediocre years....they play in a tougher conference.) I think OV would push us more and expose more weaknesses.
The other reason....this game turn's into, "let's beat the other team" type of competition, because of close proximity, old rivalries, kids switching schools, etc. It's just not constructive for BNL.
BNL is closer to OV than any other HHC school besides Seymour, and that's only by a few miles.