Native embassy:
This model is okay if all maps are in the Americas, which is obviously not the case right now. Asians constructing this very native North American-looking building on African maps look very weird.
It can either be map-dependent like trade posts, or civ-dependent like most other buildings.
Manor:
This is a unique building but looks exactly the same as a regular house, even the icon…
Community plaza for Aztecs and Incas:
These nations have strong and organized state religions. I’d suggest their community plaza (or equivalent) have a more temple-like model rather than the current “community plaza”.
Rice Paddy:
Coin mode can be visually indicated, e.g. replacing the rice with a tea farm, or replacing the central granary with an orchard tree. Admitedly the tea farm idea makes the name less fitting, and isn’t strictly necessary from a UX perspective, due to the setting being global rather than individual, unlike the individually set Fields.
University:
As UX design, the building needs visual indicators of its three possible trickle bonuses. Perhaps it can have a banner hanging for each bonus, or three braziers (instead of the current two), one lit for each bonus.
Kancha House:
Some of its model variants have a lit fire, some don’t. Since the fires are an animated element with lighting & smoke effects that inherently attract extra player attention, they should be consistent between model variants as UX design: either they all have fires, or they don’t.
Accuracy related:
There’s no end to accuracy topics, but some are particularly salient:
Native Estates:
Obviously, cotton was cultivated in Mesoamerica, so the cotton farm model isn’t exceptionally bad for Aztecs. Nonetheless, a cocoa farm would be more appropriate for them. Haudenosaunee Estate can be a maple farm. The Inca can keep the cotton farm. For the Lakota, to farm any economic crops at all would pretty much be alt-history, so it matters less if it’s maple or cotton.
Some of the crops mentioned above may need a new villager work animation.
Moroccan Mosque & Jesuit Church:
Current models are respectively reskins of age1 Ottoman Mosque & Meeting House. They look poor enough that it’s arguably better to revert to launch status: simply reuse Ottoman & Portuguese models.