The whole series is full of mysticism and you say there is no magic in Dune?
Yes I said it.
Prescience, immunity to prescience,
We know that there's sounds we can't naturally hear and colors we can't naturally see, there's nothing strange in the fact to believe that there's more parts of physic that our brain can't conceive otherwise than theoretically. That's the whole premise beyond string theory and their up to twenty dimensions with more than one dedicated to time.
Therefore, prescience isn't necessarily mysticism. The ability for a brain to move in the fourth dimension (time), or a related dimension, when under drugs, while the body itself stay in place in this said dimension, isn't necessarily mysticism, it can just be science.
As for the immunity, who know what is effectively possible once your brain can move on one of the time dimensions.
There's fully documented case of transplant receivers having memory of things that effectively happened to the donor and not to them. Therefore, why should this be seen as mysticism in a far away future, while it's just a science mystery for us ?
This one can possibly qualify.
Whatever how controversial eidetic memory is seen, there's a consensus around the fact that some people effectively have exceptional abilities when it come to their memory ; abilities way beyond what an average person can do. Those persons are an exception (it's not anybody that can be a Kim Peek and remember integrally more than 10 000 books), but they exist.
Therefore, where's the mysticism in the fact that the genetically factored humans that are Gholas, can have an effective eidetic memory ?
These things are no mere mind tricks, they are impossible; in other words, magic in my view.
Among your five examples, two are actually know and proved as totally possible, while still not (fully) explainable. One is seen as theoretically possible, one depend of the effectiveness of a physic theory, and one is effectively actually seen as pure mysticism.
Therefore, there's way less magic than you think.