ok... so I have a deep deep love for DHS. It is honestly my favorite park (out of the the other 3- cause lets be real- MK will always be number 1

) And I get quite passionate about this subject.
However, over the years this park has slowly morphed into the ugly stepsister. Don't get me wrong. I still love going there and spend a ton of time in that park... it just has sooooo many flaws. If these flaws were addressed, I feel like this park could be make its way back up to the top.
So here is what has gone wrong/how to fix it.
The biggest issue is that the park doesn't know what it is anymore.
Ever since the whole working studio element failed, this park has had no identity. The installment of thrill rides is great, but why are they there? What made so many of the original attractions great was that they had a distinct reason for existing. There was a tie in to the edutainment part of the park. Things like Indy and the Backlot Tour provided thrills but also educated you on the process of movie making.
This is the number one flaw with what the park has turned into. When it originally opened it was a full working studio that was able to do what Disney does better than everyone else- combine education with entertainment. There is no reason why there can't be more attractions based around the ideas of showing you how movies are made while integrating beloved characters. Let's not forget that the Studios were originally an idea for a section at Epcot.
So to start with- this park needs to identify what it is. Is it a place that is just going to let you "ride the movies" like Universal, or is it going to try and be what it started out to be- a park that is as fun as it is educational.
After that, then it can start figuring out what its next step is.
Yes,
Pixar Place should be expanded with new attractions. Why an Incredibles attraction hasn't been created is beyond me.
Yes, the dining needs improvement.
Yes, the Muppets should have a more prominent role (if it wasn't for Eisner screwing it all up they would have)
Yes, GMR needs a major overhaul.
Yes, Fantasmic should be playing every night and the Studios SHOULD have the BEST theatrical experiences.
Yes, the hat should go.
And list could go on and on. But none of that can happen until the park decides what it is.