I was concerned I would be overwhelmed by these towers. I was. I like.. The one city I have that is pushing these up like dandelions is a very small city that I put a control boundary around. SO that was unexpected, but, since I shut horizontal growth, there ya go. Had to go somewhere! It just needs a large park and a tallish parking garage that generate very infrequently to compliment it!

You definitely can. When loading a game (not simply "continue"), there is a button showing three dots that allows you to add or remove mods.

I reckon adding it should work with your mod too; removing will probably not work unless the player manages to somehow eliminate all the buildings the AI has placed... otherwise the game will complain about the missing models and refuse to load without.

can this be added mid game?