Yeah, I'd argue Kawhi's one of the worst / least willing passers ever to claim the title of "Best Player in the NBA" (to the extent that he has claimed it). He's several notches below guys like KD, Kobe and Pierce in that regard, let alone the LeBron / Manu / MJ / Bird / Magic echelon. He had stretches in this years playoffs where he was at least a willing passer and ball rotator, and other stretches (v. Philly in particular) where he was just a straight up ballhog. But I don't think anyone would ever confuse him for a "very good passer" in terms of creativity, court vision, unselfishness, etc. 3-4 assists per 36 on > 30 usage is meh at best.
That said, I don't think that's too much of an issue when/if your other forward is LeBron.