Almot the whole idea is to leave it as long as it takes to get down to the .5/100. It makes no sense to throw in an option to cut that short in case it takes longer than two hours. (With my 250 AH batt, it takes many hours to get that far down, dragging out the time as amps get lower as you know.)
It would take a long day of sunshine starting with the battery already up quite a bit and no load, to get that far along.
If it is not convenient to change the routine, then you just have to get new batteries sooner rather than later. How much sooner and whether that matters any, is up to the individual RVer--which is exactly as it should be.