Sorry for late reply.
For 1: True it would be a breaking change. You could release it as separate mod and so those who would want that version can run that version (which I do want) thou this brings you the dreadful another task to do when something is updated.
For 2: Icon, You could just reverse the current Icon, or just run it upside down, or just inverse colors (I would run upside icon if I were you. or if you are able to rotate it, just rotate it slightly so its straight up)