So much to dig into here. The "playing field" is not out of whack. People who own at BLT have a privilege that those who own SSR do not, which is to reserve the most desirable rooms year round at BLT. Things like what happens to your points in holding is a result of the popularity of BLT, which is why owners bought BLT in the first place. That's it. It isn't some built-in advantage for SSR owners.
And one of the main arguments AGAINST stripping rights from existing owners is because Disney cares about their image. I recognize that many, perhaps most people tend to take an immediate, short-term, narrow view of a decision and not think about reactions and consequences. Like how raising taxes doesn't generate as much revenue as projected because people find ways to shelter more income. Disney screwing over their customers in order to satisfy a subset who resent what they see as freeloaders and lowlifes who don't own what they see as the exclusive and upscale resort points (like the almighty BLT) does not help their image. And I don't just mean Disney, I mean any customer-oriented business. It takes years, decades and in Disney's case, generations to build the brand value and image that you have. It doesn't take nearly so long to destroy it (which is why Coca-Cola responded frantically to the backlash against New Coke in the mid-80s). Stripping value from existing customers is simply myopic. If they want to segment their customers, and I can understand why they might, they ought to be adding value to some, not taking it away from others.
And finally, the idea that people who own at the ghetto resorts (as some BLT owners view them) are "taking advantage of Disney" is absurd. They are not exploiting loopholes or using their points in ways that were not intended by the program in the first place. Owning particular home resort points confers certain advantages, and people ought to evaluate those before purchasing. If some later regret their decision and believe they overpaid, Disney shouldn't exact retribution on their behalf so they can feel better.