Your opinion on the concept of IP-based attractions is very strong in this article. But you do not account for or something: there is a correlation between park attendance and the new immersive experiences based off of IP's at theme parks. It's not lazy thinking at all. It's ingenious thinking to bring IP's to the theme park industry. Why would a company think differently after seeing the results of WWOHP? It's what people want.
While the WWOHP is based off of one IP in 2 different theme parks, it also has led to a creative spark in ride design and came up with some very original rides. Even Escape form Gringotts is highly original, despite being a "screen ride". I believe that basing rides around IP's has added to creativity in different ways - not taken away from it. The whole world of Harry Potter is immersive - not just a ride. Even the Simpson's world I find immersive. The only difference is less people take advantage of that experience than Harry Potter because the IP is so much more popular. In your article, you even admit you are all for Star Wars land. It seems like using IP's to you is only lazy or not creative if it's an IP you don't like or want to see. However, it might be very appealing to other folks.
I'm all for new and original IP's as well as new rides. The industry needs to be creative. But there is a time and place for it.
Take a look at Epcot. What has originality left us with? I am 100% in agreement that just changing existing rides is poor and lazy. Captain EO is playing for crying out loud! They didn't change the ride! They actually went backwards! Frozen changed the theme but not the ride design. Epcot needs originality. But at the end of the day, it also needs new stuff!
I think after Star Wars land, Disney will have to focus on more original attractions with some of its other parks. But I actually would like Hollywood Studios to become in immersive IP Park. Is that a bad way to give spark back to a dead park? It gives the park a theme of themed lands and allows for cool ride designs.