One thing I'm Clear that both iOS and Android has its own limits. All mobile phones aren't PC computers to add every features such as buildings,trees,hd 4k sceneries. First of all adding them will have a impact on the following:
Fps, device storage will decrease.
Considering this, yes I agree we missed London 3d buildings and not only them. Swiss area also i noticed there are some buildings missing. They will fix it in future. But remember this may or may not come for android due to performance issues. You can implement many features for iOS and Android. But think that iOS also has its own limits. You can't stuff many things on iOS just like that. It's like eating a burger a day. If you stuff many things a day you'll get fat right? The same applies for android and iOS. Not everything can be implemented on iOS and Android just like that. Maybe they will consider it in future. If it is streamable scenery you will get all features like buildings,crops,4k scenery,real landscapes and more..... it will no longer impact the storage and load time
Supporting your point, we don't have Eiffel tower in Paris the great dissapointment is that. Another thing is that the Italy Pisa tower is also missing. So i hope they add this in future. They can do one thing is that (streaming the scenery via cloud). But again that requires subscription not to mention them. Just giving a idea.