It seems to me that the whole thing is somehow mirror-inverted. As you wrote, the player-specific instructions are active by default, but they are never actually known. If you want to implement tactical philosophies beforehand via the opponent's instructions, you always have to "switch". Annoying.
But it works very quickly for me. Less than 5 seconds - although every opponent's "position" has an instruction by default, which I also use. For example, all wingers on the wrong foot, all those playing in a chain (defense/midfield) are pressed.
Would be nice if this could be changed, or someone here has another idea :).