This is a big question, honestly, I believe that Kyrie always has the mentality of a leader, he wants to lead the team, maybe the reason he leave the Cleveland Cavaliers as he wants to make his own team where he lead, so it was the Celtics but he wasn't a good leader in that team, and most success of Celtics was during the time he was injured and not playing.

Here, if Durant will be the leader, he needs to respect that, Durant has proven himself many times, won Finals MVP and a championship couple of times.