How is Diagon not like a shopping mall with a ride attached? SNW is a bit more to it and will be much more rounded once DK is built, but SNW seems to be in the same vein as part of Potter and SWGE. On of the main things in the are is an upcharge experience. Without the Power Up Bands, it seems like there's significantly less for people to do in the land. SWGE is very much in the shopping mall vein, especially if you don't have a time for RotR.
My point is these lands take up huge plots of land and we get what, one or two rides out of it most of the time? Idk, go to Tokyo Disney Sea and you'd see what I mean. There's rides/shows around every corner, both Modern and a bit more Classic feeling, The park has almost all original areas where they put IP rides in, but they try to make those rides fit the theme of the land.
If you want to expand EU, you have very limited options as it has to be something that's either Monsters related, WWoHP, Dreamworks, SNW, or something like Pokemon to go in the expansion site. Maybe Lord of the Rings if that ever happens. I just feel like it's so limiting, especially since they are basing two lands from the jump off of what I would consider dated franchises already as I said above (FB and HTTYD).