I think it makes a huge difference to know an all wise, all knowing God rather than a God who can’t see everything, including the future, and is limited in knowledge by our free choices. Your position only makes sense within the paradigm of open theism. So when you said you are not an open theist, you were showing that you have not really thought this through.
Your Calvin phobia has caused you to embrace and defend a system that is basically open theism.
Otherwise, you would not challenge the concept of unchanging, non evolving, perfect foreknowledge, and seek to replace it with ever changing, evolving, imperfect mere partial prescience as you are.