90% of the people here undersell how crippling it would be if he became a non-shooter. You cannot play this space offense with non-shooters on the floor. Taking and making 30% is FAR better than passing open looks or letting the defense ignore you. He makes enough to keep defenses honest, and 24 seconds isn't enough to keep swinging the ball past the first open look.
Like I've said before, the difference between Smart shooting 30% and 36% at his current volume is 1 point per game. Totally negligible next to the 5-8 extra possessions he generates. He also plays a critical strategic role as 6th man -- after the first 6 minutes, Stevens gets to assess who has it and who doesn't, which matchups are bothering us etc., and he can literally insert Smart for any player on the court. He's the ultimate fixer.
We'd be crazy to let him go.