I recall that Steve Nash became leaner, faster, quicker, when he became very serious about his off-season workouts. He realized that he was not a superior athlete compared to other guys in the NBA, so he had to work harder to become stronger, and leaner, etc.
I found this link
https://www.nba.com/suns/blog/steve-...layer-workout#
IMO, like others have said, if Luka ever decides to commit to offseason workouts like Steve Nash, he will be unstoppable (e.g., imagine Luka, at 10 LBs lighter than he played last year, but stronger, quicker and with more endurance). Until then, he will be very good. Hopefully, he figures this out pretty quick