If that happens, I guess we'll know how the locals and off-site guests feel.
This thread has been fun because it is a lot of speculation about an area where there is absolutely no precedent. We know what will happen if airlines reduce their seat size, a soda company changes its formula, etc, but do not know the impact of changing the FP+ system.
With that said, I can see Disney expanding this to DVC guests, but not to others. The reason is if I am a cash guest staying at POR for $250 a night, plus the cost of meals and park tickets, I know that I have an expensive trip ahead of me. If my goal is to ride both of the new Star Wars rides, as well as Tron, FOP, and Soarin', then I know that I have to book at least a 5 day trip to get all of those rides in. That's $1250 in hotel rooms, plus about $200 a day in meals and snacks, and about $100 a day in tickets for a total of $4250 for a family of 4- all of it going to Disney. Instead, I can just pay to stay for 3 days, buy just a 3 day ticket, and instead spend $200 per day to get my family this extra incentive. Now I am spending 2 less days on hotel rooms and meals, and am probably not eating out a much on my other 3 days due to them being spent park hopping to get my rides in. My total cost is now $3150, assuming I am spending the same amount on meals. Great for the guest, bad for Disney. That's a loss of over $1000 in an easily believable scenario.
This is also why I think it will be tried with DVC members. We are a captive audience. If we wanted to do the same thing, we would either have to eat the extra points we aren't using (a win for Disney - extra cash inventory), or rent them out (a win for Disney - more people coming to the parks).
I will be interested to see how things develop. I still think that making it easier for people to plow through the parks over a short time is not in Disney's best interest. They are financially best off when they get people to stay for 8 days or more, taking in a few rides each day, going mini-golfing, eating dinner at the resorts, and racking up a huge bill along the way. They are not built the same as Universal, which is solely based on getting as many rides in as you can in a short period of time.