I would love to see a better variety of shops and items within those shops like there are in actual theme parks. Plushies and other toys, clothing (only hats isn't enough - people want t-shirts!), jewelry, carnival games, etc. There could also be a better variety of food/drinks based upon cultural themes (i.e. a German Festhaus like they have at Busch Gardens) and even have a bar option for adults (just like Frontier has in JWE). Yes, there is more variety with restaurants, but I'd love to see sweet potato fries at all Monsieur Frites shops or (even though I'm personally not one) even a vegetarian restaurant... or a buffet ...or a special eatery where guests can pay to eat with their favorite characters like Miss Elly or the Gulpee T-Rex
Sure the rides and coasters are a blast, but if I'm going to spend hours building my own Bavarian themed building, I'd love to be able to put a German food shop inside of it... or put an Indian eatery inside a replica of the Taj Mahal