The tile roof component is comprised of >34,000 Edges and nearly17,000 Faces
That, in itself, is a “brick”… A mass of overly complex tiny geometry that will slow model performance.
Exploding all the tile roof components will only exacerbate the performance issue and bloat the file.
Here are the Model Info - Statistics for just one instance of the tile roof component:
Add my vote for texture image vs geometry for the tile roof.
Below is an example.
The tilling texture image was rather hastily crafted from a screen shot of the roof tile geometry in the model.
Here’s the tilling image 99 x 117 pixels:
-Geo