Excellent points. My only thinking on placement is that, by adding rides to DHS first and then either EPCOT or AK, they could alleviate some of the pressure on Magic Kingdom. However, theme does need to be consistent. For Tomorrowland/Future World, they can use clean lines and build what we hope things look like (fountains, trees, etc). For this thread though, I feel like the attendance decline has been a direct result of bad investments in the parks (meet-n-greets instead of rides). Once concern I have with the announced DHS fixes is that they won't continue but will instead stop. That seems to be more the WDW process, which is to not carry through on plans.
Someone mentioned dependence on foreign tourists as an issue which I agree with as well. The overseas (ie. Europe, Asia) tourists are more likely to be from first-world countries with more stable economies although there are no guarantees. A country like Brazil (whose tourists get blamed by some for being bad guests) is not quite as stable. I don't know. It's kind of a mess. However, it reflects a continued stream of decisions that, on the surface, appeared to be bad.