I've always wondered that maybe if you were the team captain you could change these, but I don't think it's possible.
I got called up for the U.S. team during the world cup and was subbed in near the end of our first match. In a replay I noticed I was the captain. I quickly went to the formations page, but was not able to change our strategy.
I haven't made captain in any club teams yet, so I who knows. Maybe in a club team you can. :unsure: