Recently, the ACC held a vote to determine if the football conference schedule would remain at eight games or shift to nine. Athletic directors voted and the conference will stick with an eight-game ACC schedule.
The big thing here is that an eight-game schedule gives teams more flexibility when determining non-conference opponents. With four non-con opponents, teams have a little more leeway in who they want to play.
For a while, I've been on board with an eight-game schedule. Eight games gives teams the opportunity for two 'tune-up' games, a rivalry game, and another P5 game - or some combination thereof, obviously.