Yeah, going to from 10 to 13 will usually gain some win%, but the odds were high NU was going to win regardless. In my mind, the 2.8% is pretty negligible. Pushing that probability out to basically 100% with a TD would have been the real net gain.
Note that win percentage doesn’t factor NU’s issues on kickoff and punt. In the event of a failed 4th down, the field position advantage for NU’s defense helps offset the 3 points sacrificed. The extra time Maryland would need to spend moving the ball into a position to score should be considered as well. Keep in mind the clock no longer stops on the first down until the 2 minute mark. It’s likely that the consequences of the rule change are still not entirely known and fresh enough to not have truly entered into coaches collective thinking.
As Anthony Herron stated on the broadcast, analytics probably tell you to go for it there.