Luka will need to be catered to...a difficult task with a salary cap. This is not the BS half-measure of FFP, but real financial restrictions. Bagley, OTOH, is a young, sleek Ronaldo just waiting to blossom.
Players who create for others aka cater for other players are: Ball handling offensive creators. For example players like Fox, Doncic, Kyrie Irving, Kemb Walker ect.
Players who need to be catered to: Finishers and pure catch and shooters who cant create effective offense by simply giving them the ball. Guys like Bagley, Deandre Jordan, Clint Capela, Ryan Anderson ect.
You can always improve the effectiveness of these ball handling creators for example by surounding them with shooters and creating good offensive sets but if you want anything significant offensively from finishers, you need to cater for them very heavily and that happens by defense focusing on players like Fox or Luka and that opening opportunities for finishers.