I look at this from a slightly different perspective. All of the positive changes done in the past few years (new attractions, hotel refurbs, etc) will ALWAYS be overshadowed by the failure to execute the basics (CM rudeness, non-working ride elements, slow restaurant service, etc.). These will always be the things that people will remember. Once a company forgets how to do that basic, daily execution, they loose their competitive advantage. It is all about reinventing yourself while still meeting that basic customer expectation.

As other posters have said, Disney is all over the place and not showing consistency in their decision making and delivery. The ratio of hits and misses is pretty much even; management should be doing the right things (not always the expensive things) to tip the scale back to the win column.

Will I still go? Of course. Will I expect to be blown away completely every time? Not likely.