Ride-wise I totally agree with you, especially with Hagrid’s now open and JP around the corner. But as a whole, when you take theming, entertainment, transportation, restaurants (and let’s not discount the staff and maintenance, which Tokyo is in a league of its own) the park simply stands head and shoulders above the rest. It has that “walking into Diagon” feeling with over half of its lands/islands.
Edit: After I typed that, I thought... “so about JP...” Hah
Sorry for the tangent mods.