The flow of information if changed would change type, if ILE all of a sudden the preferred information flow went from Ne->Ti to Ne-Fi then they would have changed types, or perhaps created an alternated TIM(dissociative identity disorder is a thing). This wouldn't change function strength either. From my study of various dissociative disorders, this is entirely possible, some dissociative identity disorders can be visually blind in one personality vs another and this can be confirmed via neural imaging, the vision receptors are simply shut off due to some trauma. I assume many more changes to the brain can occur via trauma, physical or psychological. However even if preference changes to trauma, strength might still be preserved. The model is only a efficient ideal of a information metabolism, but it has really no bearing on the possible variation that exists, which can be as inefficient in many ways as long as what is necessary eventually occurs.