Hi, I'm new, and I'd like to add my two cents...
Universal never said it would be a whole theme park, and theme park enthusiasts should know better than to think others will be disappointed. Disney would have done a very crummy job in my opinion, they would have had all baby rides... Universal is perfect for this, they can do big thrill rides. And for another thing, it's not the size of "half an island". It's about the same size as most of the other islands.
Universal has not let me down so far, and I'm not only a Harry Potter fan, I'm a huge theme park fan (duh). People who are NOT fans may be even more amazed at it because of the things they are going to have. They are going to have the craziest things there, and if anyone wants info on the section, I am up to date about info on the park, so anyone needing info can ask me.