I want to suggest another option for disintegrating a building.
I was looking at disintegrating a few buildings and I noticed you have to pay to do this. As the game goes on, I can imagine one would need to replace certain buildings with others – or perhaps want to change the layout of one city after claiming another. For whatever reason you may need to disintegrate a building, you can’t unless you pay at this point. Perhaps you could also disintegrate one level at a time, that takes time to do and fills the queue for building. This makes it a challenge for the ones not paying and still a breeze for those that do.
Just a thought. (Or perhaps I am missing something.) Great game anyway. I am waiting for a building to build as we speak :)