I've been 3 times and as I mentioned above, there are certainly highlights and great attractions, but I don't get the feeling that they "spared no expense".
Wettham1783 above said it perfectly. WDW is supposed to be Disneyland on steroids but it's far from it. With only 12 more attractions than Disneyland resort (mostly shows and walkthroughs), there just isn't enough for me to make a visit until they add a whole lot more.
I actually spaced my three visits far enough apart so that they had nearly a decade to add new things. As it turns out, even though new theme parks and resorts opened, smaller touches and attractions became missing. And the theme parks that opened up were not even completed.
Now, they removed my favorite thing: Adventurer's Club and new attractions are just clones from Disneyland.