As I'm reading the post, and I see it meander and go off-topic as so many threads do, one thing that strikes me is how many people seem to think the OP was saying "wahhhhh, WDW is too expensive now."
Maybe I'm illiterate, but I don't read it that way.
The OP was offering a theory that when the increase in ticket prices matched the increase in CPI, WDW experienced decent profits and its most creative expansion. When it spiraled away from CPI, most of the "improvements" in WDW had less to do with new parks and new attractions and more to do with places to spend money - new resorts, DVC, expansion of (at least plans to expand) DtD. Meanwhile the perception of "value," which doesn't necessarily mean "is it cheap?" of WDW has diminished. There are plenty of threads here with people griping that WDW is less "magical" than it was 5 or 10 or 20 years ago, messier, less polite cast members, attractions or resorts looking shoddy and in need of refurbs long before they get them (and don't even get started on the Yeti). Are the two things a coincidence or did one beget the other? Does the drastic increase in price compared to CPI indicate anything beyond corporate greed?
You can argue the OP has a point or not. But the OP's point, as far as I can say, goes beyond "WDW is too expensive nowadays."