Consider how much you're going to use it. It's $4.99/month, so if you're going to use it more than nine or months of the year, the annual price is better. If you want it just for Ohio football and basketball, then you probably should just pay the monthly price and cancel in March.
So many football games are on other networks that there aren't that many MAC football games on ESPN+. But most of the MAC basketball games are.
Agreed - I bought it for hoops season last year and used the heck out of it, and enjoyed it. For football, I don't really see the value in it for the few Ohio/MAC games that will be on it that I'll want to watch. If the game is on ESPN+, I'll listen to Russ & Rob.