Kaci plays too slowly right now, but I'm optimistic. Two players that were renowned for slow play in the decade of 2000-10 were Souquet and Archer, but both, when called on to do so, learned how to play well in events having a shot clock, and each won many titles in events using a shot clock on the stream/TV table.
At the US Open 9-ball, Kaci had to play the final with a shot clock and he got crushed, but I'm guessing that, like Archer and Souquet before him, Kaci will figure out how to play his best when the shot clock is in use. If not, he'll have a hard time winning events like the US Open, the World Pool Masters, the World Cup of Pool and the US Open 9-ball.
I feel strongly that Kaci will figure it out.