probably good, anything that keeps it evolving. Some other sports I follow like the NBA, MLB and international soccer have it so much better than college fb/bball now.
Basketball really needs just a few coaches challenges with few other replays, but the challenge can correct obvious blown foul calls. One of our games in Vegas there as an out of bounds call and the replay review showed a clear foul that caused the out of bounds, in the NBA if the opposing coach challenges an out of bounds play where their own player shoved a guy...the refs just make the right call on the guy who shoved him out of bounds. It's nuts that is not allowed in a college replay.