What, Ole arrives, says go and enjoy yourselves, players are happy and go out and score, then wait, what, oh no, no coaching what are we going to do, oh look there's Bruno, thank God, he's saving us, then oh no, Bruno's tired, we're finished.
Do you imagine there was no formation or tactics during Ole's caretaker period? Or that it's remotely meaningful to consider whether the explanation for our success with Bruno is either solely because of him, or solely because of other things, as if one ruled out the other?