"I think we should also share details of any Christmas activities that we would like to take them to" is problematic--you shouldn't (lol) be telling her what she should do. You control you, she controls her. If you feel like sharing a couple of the Christmas activities you're taking them to, you're free to do so.
I also agree with shorter and simpler. My holiday agreement for the whole year takes 1/3rd page.
You control you, she controls her. If you feel like sharing a couple of the Christmas activities you're taking them to, you're free to do so.
