Some thoughts as to why the percentage of does killed was not higher.
1. The aerial flyovers with Infrared mapping of deer showed that preseason populations in Sproul State Forest were in the five to ten deer per square mile range. With populations this low, hunting is really a lot tougher than when there were four times as many.
2. We start hunting with guns for deer in October now with the early muzzleloader season, the last few days of which we have kids with rifles. I know many don't want to hear this, but the deer are scared early on and are more wary than they used to be when we didn't hunt them with rifles until after Thanksgiving. I know that the deer where I hunt are more wary. Yours might be different.
3. I don't hunt in Sproul, but in the area of southern Huntingdon County where I do hunt, I am finding much more sign than I thought I would, based upon the numbers of deer I saw during the fall seasons. There are more deer out there than I am seeing. I see no reason for Sproul to be different. I estimate that our overwintering population is between ten and fifteen deer per square mile. My estimate is very much unscientific. I hope we get some snow so I can do a better inventory.
4. I don't believe hunters are refusing to shoot does, at least not huge numbers of hunters are doing so. The hunters around here are killing what they see, and many are killing the first deer they see. A few, like me, hold out for a few days to see if they can get a nice buck and turn to doe hunting later in the first week. I can afford to do so since I am retired and hunt every day. Many can't.

As to hunters hunting hard, I have this story to relate. I shot my eight point on the second Thursday of rifle season. After I hung the deer at my camp and was skinning it, a truck stopped in my driveway. Two "hunters" got out and one asked me, "Where the hell did you get that one?" I replied, "High up on the mountain in the foot rocks." His reply, "No deer is worth that climb."
Obviously, we disagree. Not many nice eight points are taken from the front seat of a pickup unless at night.