How does one play catch-up when they are now and have been miles ahead to begin with. Universal is a completely different experience in scope. It has many very good attractions, some even better then Disney's and that is back from years ago. What Disney is doing is making an attempt to stay ahead to the same degree that they once did, but, to think that they are trying to catch up just doesn't hold water.
I have been going to Uni since it opened, but, the number of days at Disney compared to Uni is laughable. It isn't a everyone fits park (Uni), Potter has never been anything for me because I am bigger and miss the ability to see the attractions by literally an inch in the waste-line. So Disney is not affected by Potter if they aren't slim and trim. Disney made the effort to design for everyone, not necessarily focus on the ideal. That is what has kept Disney in the top spot for years.
Don't get me wrong, the fact that Uni exists has forced Disney to create things that are new and imaginative, like Pandora, and for that we should be thankful. I can go for two days at Uni and in that time have run out of things to do because they have put a great deal of emphasis on "thrill" and because of space needed to have less common attractions. Potter didn't have to exclude so many of us. Although overweight, I am not that far over the line. I should be able to experience everything like I can in Disney. The only thing that stops me at Disney is my desire for a certain type of attraction, not the problem of having to "fit". They missed a big opportunity because the were very close with that one of having both, but, failed for many of us.