Count me as one of those people. There's plenty to do at IoA, but it's Potter that draws us there in the first place. They desperately need some more Potter themed acreage to help disperse some of the crowds. We were there last week and it was borderline unbearable. Also, I believe WWoHP only got half of an "island" for itself, sharing the other half with the remains of Lost Continent. Somebody will certainly correct me if that's wrong. To me, the new London area will finally bring it up to a full size section, only split across two different parks.