Sounds like a start toward the 'counterfactuals' of Molinism. But your description, as far as it goes, is probably a better description of open theism.
Assume a universe of 100 'choices' (obviously, way too small, but just to put a number on it), all you have said thus far is that all possible outcomes of the free agency are "contained within God's knowledge." So, God knows that the one of those outcomes which will eventuate is somewhere within the universe of 100, but He cannot truly 'know' which one it is until the free agent makes his decision.
That's why I say that, with open theism, God would have probabilities attached to each possible outcome.
I haven't read any advocates of Molinism, but (as I understand it) Molinists posit "counterfactuals of freedom" which are really, not only all possible choices, but all possible choices in all possible universes. I am not sure whether they try to make the last leap from the highest probability outcome to true "foreknowledge" or not. Is that the source of your thesis? Do you know any more?