I can't see using Young, Doncic, and Booker on the floor at the same time, especially if we still have Jackson and TJ.
However. If Len continues his quality play and we resign him, Bagley might be an interesting choice with Young. I would have no problem drafting a replacement for Chriss.
Young, Booker and Doncic is pretty much the perfect case scenario. Which coach would not want to use players like Young, Booker and Doncic at the same time.
Doncic's best position is SG or SF. Why would you want to waste him at PG where the depth of quality players is by far the biggest.
That is a much better combination than anything you could build with Warren or Jackson. Three guys that can shoot and make plays.