I'm not going to deny Young is the better fit and I would be VERY excited to have a Young/Booker backcourt. I think Doncic is the better player though and fits with today's NBA being multipositional.
prisoner of the moment. What's today's trend won't be tomorrow's. The "multi positional" thing is great if you have a 6'10 Beast in Simmons... or a 6'11 Freak like KD. But even TODAY'S teams that are great ALL have SIZE. The Warriors are actually huge with 6'11 KD and McGee down low. If Leonard was healthy, they too would have stereotypical size at every position. But we're not even competing with those teams and won't be by the time we're ready to rock.
Tomorrow's teams are New Orleans, Utah and Minnesota in the West with the Philly, Celtics and Toronto in the East.
And ALL of them have practically standard size, players at their given positions.
Building your team in today's model of the NBA will leave us in the past.