When we see West European and East Asian architecture, we can feel both look very poor compared to later added ones like Central Asia (Tatars, Cumans) and Southeast Asia.
They remade East European and especially South European architectures.
But why not with West European and East Asian architectures? I think these really need remake.
For example, East Asian architecture should be remade based on Chinese architecture instead of Japanese architecture. This makes non-Japanese East Asian civs look weird. At least all East Asian civs other than Japanese should share Chinese-based architecture.