"...thoughtlessly roll the wheel back...". I think the ability to roll a counter back when point has been over-shot is a great value.
As a measurer, when I am doing my measurement paperwork, I record what the counts should be at every mile point. If I go too far, I simply roll back to that point. My paperwork remains clean.
On the other hand, if I have to change the expected count on every point beyond where I just missed, that is erasing and re-entering, creating the possiblity for numeral transposition and other errors. Do that twice (or more) in a marathon course, and you have more potential for error. Even one or two clicks too far can cause issues.
I think Fabio is right on the money with his desire to do roll-backs in the case of over-shoots.
As a Certifier, I wouldn't want paperwork that had been adjusted due to overshoots. Very messy, and much harder to verify counts. Do Certifiers have any comments on receiving paperwork that has been "fixed" due to overshoots? I think my certifier would tell me to use a Jones, not electronic, if I had more than one over-shoot in every 5 courses, and I couldn't argue the point.