First of all, IanNem, that was a great blog post to read!
I agree with your points in your post. I personally think that Disney should keep it the way it's been for years. Ok, so some have paid more to stay on site, but that was their choice, and they get a few more perks as it is. So, should they get first choice on Fastpass? I don't think they should.
I think that the current system is actually quite fair to be honest. It works on a sort of "First come, first serve basis". Everyone runs to the bigger attractions to try and get an early return time, but if you can't be bothered to run, you still get a pretty decent return time maybe an hour or so later.
For me, the current Fastpass system works perfectly, and shouldn't be tampered with, but who knows...it might work out!