I could see it being useful in that if a team doesn’t know how much time is left, they won’t take a knee and actually will have to try to be aggressive and get a first down.
I never understood the stupidity of pro footbal in that regard. The QB hands the ball off, the runner is tackled, the whistle blows, and nobody can do anything but huddle up for the next play while the official places the ball ... and the clock keeps running while all this sh!t is going on.