I hope I'm proven wrong, but I don't share as much enthusiasm on Duran as many here.
He's got great speed, but his defense needs work. He had some pretty good offensive numbers, but the BAbip and other numbers point to the chance of it not being as good as the numbers indicate.
He probably needs at least 3-4 more months at AAA, assuming there is play next spring.
soxprospects.com has this...
Summation: Potential fringe starting outfielder with two carrying tools. Ceiling of an everyday center fielder. Nailing down his future projection is tough without a chance to evaluate swing changes made in 2020 without true game action. Speed is not a question, and hit tool should get to above-average if he can refine his approach. If 2020 power development is real, he could become a dynamic offensive player. Has already shown strong ability to make contact and drive the ball into the gaps. With his speed, has the potential to put a lot of pressure on the defense and inflate his average with infield singles and slugging by taking extra bases. Could also steal 30-plus bases if he improves his instincts. Is still continuing to develop in center field, but likely to develop into at least an average defender there and has the raw tools to become an above-average defender. Has one surefire major league impact tool in his speed, so should have a role on a major league roster even in the worst-case scenario, especially if MLB retains the runner-on-second rule in extra innings going forward.
https://soxprospects.com/players/duran-jarren.htm