Noone is shooting Helical fletching so why the drop away?
Lots of guys shoot helical that I've seen, including me. I would say that there are probably other guys like who shoot 3-D as a means to practice hunting shots. Because of this, I shoot the same arrow in terms of fletching and weight that I plan to use during the season.....minus the broadhead, of course.
The drop away gives those double-duty bows consistency to take into the hunting season.
Fritz