At least 5 of the top-10 players in the league are meh 3pt shooters.
* Lebron
* Giannis
* Doncic
* Anthony Davis
* Jokic
With respect to Lebron/Doncic, heck let's throw in Simmons and DeRozan - they do so many other good things on the floor. If Barrett's midrange shot goes in at 40% and 3pt shot goes in at 20%... well, the math says that he's better off shooting that 2pt shot. He's young, his shot is a work in progress.
I'm pretty happy with his progress thus far on his free throw shooting. It shows he's gaining more confidence and consistency. He's currently 18/23. If he can hit free throws, it bodes well for his future from the 3pt line.
I don't expect him to fully arrive until next season the earliest... but I'd like to see him mix it up more. His upside is more than that of a Bullock/Burks/Ingles. The more he mixes up the type of shots he takes the more his defenders will hesitate a little bit when gets the ball.