you know I see this argument all the time, and I just don't agree.
I'd argue that large coasters like Hulk and DD, are what has drawn a lot of people to these parks in the first place. Disney still does not have anything like it in their parks, and who really goes to Sea World for just roller coasters? (hint: not many people). Hulk, RRR, still command long waits, especially Hulk. DD has the benefit of excellent capacity (it's technically two rides), so we don't see lines as much.
I'd also like to call out the folks that think large roller coasters can't be properly "themed", All three of their coasters have a heavy theme, "although DD lost a huge portion of it when Potter took over". That being said, not everything needs to be themed to be considered fun.
Orlando does not have a "coaster focused" park, so in my opinion, the more coasters built in UOR the better.