This is going to be somewhat from an outsider looking in (I guess that's what you asked for ). I live in and hunt in Ohio, but I live only 6 miles from the PA line. I did live in PA for several years in the late 1980's, but didn't hunt during that time. I do backpack and hike quite a bit in Pennsylvania even now. These are my very biased observations :) .
1. You can hunt to see lots of deer or you can hunt to see big deer. It's hard to accomplish both. I know folks from PA who think that if you don't see 20-30 deer at least during a day of hunting, then there aren't enough deer. Do you know how many deer I typically see during a day of hunting in Ohio? Maybe 4-5 if I am lucky. Some days I don't see any. (I hunt 200+ acres of agricultural land.) Which state produces more trophy bucks?
2. I remember the days when I lived in PA in the 1980's and I could not believe how many deer there were and how small they were.
3. While backpacking through central PA, I've seen first hand the browse lines and how the forest understory in some areas is stripped of vegetation.
4. About 8 or so years ago, I heard Dr. Alt talk. I was amazed to hear about areas of PA where 1 1/2 year old does had not achieved enough body weight to come into estrus. All due to poor habitat. That is crazy! Heck in farm country a good portion of fawn (6 month old) does will breed. That alone should point to big problems with the deer herd in those areas.
5. In 1995, Ohio held a 2 week gun season. The deer population was DRAMATICALLY reduced where I hunt. Everyone was so mad and there were meetings all over the county about what had occured. Ohio went back to a one week gun season the next year. Do you know how long it took until I was seeing just as many deer as I did prior to 1995? Two years. Yep, with good habitat, deer populations will rebound VERY quickly. If the population doesn't come back, there is something wrong with the habitat and that can't always be fixed so quickly.
So from an outsider's perspective, I think HR is LONG overdue. Will it be a perfect system? No. Will it need tweaking from time to time? Yes. But it needs to happen. I think some hunters in PA need to come to grips that seeing 20, 30 or even 50 deer when they go hunting is not "normal" or healthy for the deer herd. It might be fun, but in my not so humble opinion, we need to care about the health of the deer herd.