Luke was above average as a freshman and sophomore and elite as a junior. His ascension wasn't all because he had an epic offseason like Zach Wilson did. It was because Doman, the scheme, and offensive line created an offense with massive running lanes.
Luke is an all-time great just like Zach Wilson is an all-time great, but neither is the GOAT even though each had arguably the best season in all-time BYU history.