It's pretty clear that those who have already stated they are underwhelmed by WWoHP are not fans of the series (at least those who have said they aren't) thats fine, but I don't think you were Universals target audience, so I honestly don't think they expected you to be like "Oh Wow!" because the details in the area are very true to the book and are most likely only going to be caught by the fans.
The fans of the series, Universals target audience, are the ones they were afraid would be "underwhelmed." Having soda, making the shops larger, are all things that would have caused them to be "underwhelmed". It was a smart move on Universal's part to stay true, and very "Disney" like.
Think about the people you know that go to Disney that hate it, majority of those who hate it do not like Disney. They don't like Disney movies, Disney channel, disney music, so why would they like Disney World? And some do like it, but they don't have the same appreciation for the details like Hidden Mickeys, overly themed queues...etc
I think the people who have been in this thread since day 1, the people who have followed the construction updates, the interviews, seen all the movies, read some if not all the books are the folks who will absolutely love it. The rest of the world is there for the rides and I'm sure they'll be dissapointed.