Bowling Green didn't back out as much as the MAC conference schedule made them. In fact, it was basically the MAC conference that negotiated this deal. Remember we owed Bowling Green a home game. Really we got a great deal out of this. Instead of a 1 for 1, we got a 2 for 1. Originally the deal was just a home and home with Bowling Green. Now we get 2 Home Games (FAU, Bowling Green last year) for just 1 road game (FAU).
Personally I would think FAU is better. We might get at least a little exposure in Florida where there are a ton of recruits. We got a pretty highly rated QB coming in from FL already. Plus for those able to attend the game, there isn't many nicer away games to go to.