Leonard is not taking as many good threes as he used to. Part of that is that he is forcing the issue more on offense, and part of it is that he's no longer getting the looks he used to get with Parker running the show. Players like Green and Bonner will pass out of bad attempts in the majority of cases. Someone needs to make something happen on offense, and Kawhi is trying to step up.
But as I've been saying for a while now, fans are overrating Kawhi on both sides of the floor. He's not nearly as good on offense right now than many folks on this site pretend he is. Some people think that the problem with the Spurs' offense is that Leonard doesn't get the ball enough. While I agree (and have been asserting for a while) that he should get touches in the post, overall he doesn't need more touches than he's getting now. He needs to return to his previous efficiency before his workload is increased.