Here's my idea.
Lets say you want to replace all your pavements with solar pavements. You would have to go through bulldozing all of them, remembering where all of them were, and finally replacing them. Not only is this a waste of time, it is a waste of materials.
There should be a replace button on the menu of each building, so you can replace each building with one of the same size. There should be a "replace" and a "replace all" this would be beneficial. thank you.