The 3 newest maps - Cliffside Bay, Grand River, and Foggy Hills, are all European (base theme) tileset maps. This tileset adds new models for high density residential, high density commercial, and offices, as well as adding new building models for city services such as health, fire, police, and education. These new building models have a larger footprint than the vanilla buildings.

In order to get the option to use the vanilla buildings again, from the main menu, select Content Manager, go to Styles, and ensure the checkbox for European / Vanilla is checked. This is not a mod. Also, this simply ADDS the vanilla buildings the European tileset options, not REPLACES.

GLHF

Aso disabling day/night cycle and weather are good QoL changes