I'm not sure either. I do think there is still some potential for a slight bump up in production/effectiveness. He's just never had much consistency in his career between his injuries, the situation in Brooklyn changing wildly, and in Indiana he's had two coaches. It's likely he is who he is at this point... but there is still a slight case for it.
I do wonder if you replace a bad defender with an average one if it looks a lot different because our perimeter defense is so porous. I'm lukewarm but I could talk myself into it if we got him. I think realistically there aren't many guys available with that pick and Caris is one I can see as a realistic possibility. I think you could also slip a Ingles for Lamb swap in the deal that saves us some luxury tax and Lamb is at least good at getting steals. Would be an athleticism upgrade.
I'm not sold on the deal and that is likely a good sign it is in the ball park of fair.