Historian Jim Bradbury has summarised the current historical opinion of John's positive qualities, observing that John is today usually considered a "hard-working administrator, an able man, an able general".
O historiador Jim Bradbury resumiu a opinión histórica actual das cualidades positivas de Xoán, observando que hoxe en día segue a ser considerado como un "bo administrador, un bo home e un bo xeneral".