I think your Schroedinger's Cat comment might be relevant here. I think that we both have free will and don't have free will at the same time, depending on which perspective we use. I pose that since we don't have God's perspective, we must use our own. From our own perspective, we DO have the free will to choose what to do.
Let me give one more example, and then I believe I will have given it my best to clarify my point. You are walking along and you come to a fork in the road. You can't see what is down either road, but you have to choose one. God knows which road you will choose, and He knows what the outcome is because He planned it all. Does He tell you? No. You must decide on your own. Let's say you decide to go left. Ok, God planned it that way. Let's say you decide to go right. Ok, THAT was God's plan. Since we don't know what His plan is, we must make decisions on our own. That, my friend, is free will.
Just because God has your life planned out entirely does not mean that you can go through it recklessly and still get to Heaven. If you go through life recklessly, maybe that was His plan for you. You may die and go to Hell. However, if you decide to follow God's instructions, then He must have planned it that way and you will get to Heaven. Whatever you choose to do out of your own free will, that was what God had planned you to do.
Exactly ! God's plan was (and is) for the majority of his loved creations to go to hell.