Pre Match Screens

I select my team to do a variety of tasks when I get the opportunity in the pre match screens.

I use closing down, marking and switch to the other foot as I see fit.

QUESTION

How would I know the line up?

How would I know the starting formation?

I could guess on what they might line up like but would not know the actual line up until minutes before the game starts.

Is this option supposed to work with me saying to my team on their way out to the pitch (its Ryan Giggs on left wing - close him down and make him use his weaker foot at all times)

The feature is obviously key to the game but IMO not that realistic