Dallas is going to suffer from the same problem Houston suffered during the height of James Harden's powers. There aren't a lot of high usage stars that want to play with another star whose usage rate tops the entire NBA. If it's a chance to win a title with Lebron, some will take it, because Lebron has managed to win a few titles. He's got the kind of clout that matters in the NBA. A guy like Harden hasn't been so fortunate. He hasn't sniffed the Finals yet. And he had to force his way into a "Big Three" because nobody wanted to play with him long-term in Houston.
Likewise, Luka hasn't gotten out of the first round with the Mavericks, and his usage rate squeezes out the possibility of other ball handlers thriving alongside him. What assurances do Lowry or Derozan have of either individual or team success in Dallas? None of this is to knock Luka. He is still so young. He is phenomenal. He is unique. But strangely enough, he's almost too unique. He got too good too fast for the pace of team-building in the NBA. Now Dallas has to scramble to construct a winner around him with very few tools to do so, and no free agents are beating down their door to play with the Slovenian wunderkind.