Yes , the winning teams don't change, but as i was saying... i am referring to teams that are in bad form like in the example above.
Take Sheff Utd IRL... they lined up with a 5-3-2 at the beginning of the season, now they used a 4-4-2 against United.
No reason why AI couldn't be more flexible if they are in a bad run of form since they do have more than 1 formation at their disposal