I could be wrong but if memory serves me correctly based on the game and fish presentations, archery success was around 11%-13% and hunters hunting with crossbows during OTC archery hunts was around 33%. This was part of the argument made for removing crossbows from all the archery hunts. As more archery units go to draw it just forces archers to move to fewer remaining OTC hunts. Thus, you will see more units go to draw. Some units are more conducive to road hunters. I predict you will see 20A go to draw in a year or two as well.
I'll admit, once G&F required mandatory reporting then started publishing the actual numbers of deer taken during OTC hunts, I was very surprised. Most the mule deer units get hammered. Call me whatever you want but I have always believed there should be no OTC opportunities for NR's. AZ just doesn't have the numbers of animals to allow this. Human population in this state is growing at 1 million every 8-9 years yet our animal populations are decreasing or staying same. Then throw in uncontrolled wolf numbers, feral horses/burros, drought and loss of habitat. Somethings got to give.