The original Batwing receives signal from front and from the back in equal strength. Adding the Wingman makes the antenna directional-it is more sensitive to signals from Wingman side than from the back of the antenna. Sort of like a zoom lens on a camera. The original Batwing is longer-tuned for VHF band while the directors(the Wingman)are shorter length tuned for UHF band.
SensarPro allows to measure signal strength from different sources, direction to different sources and shows a channel number of received signal.
When I arrive at a new location, I "map-out" the location by turning the directional handle in 30 degree increments full 360 degrees and making a note of all channels, their strength and direction. If I find two channels in opposite direction, I point the Wingman in the direction of the weaker signal because the back of the antenna might receive the stronger signal in sufficient strength. The signals that read less than 50 on SensarPro will very likely not produce any picture at all. To get as many watchable channels as possible I might point the antenna to direction other than any particular channel. So you can see that the directional handle gets fair amount of use the way I do it. Keeping in mind the 90 degrees shift all the time.
Should Winegard decide to move the stupid arrow to the right place by making a new directional handle, I suggest they also make new ceiling plate that would have degree marks for easier mapping of signals. It only makes sense with the invent of Wingman and SensarPro.