Hard to say before he comes over. Not sure he is expected to come over this year due to the contract. Also Korkmaz isn't projected to be much more than a great shooter at this point I believe. I understand he has been playing well on his new team but after seeing Luwawu most would argue Luwawu is better than Korkmaz because of his defense and slashing. He really is a great fit.
You know the thing about Luwawu is he isn't built to be a usage hog. His skill set is a good fit for embiid and simmons. He is pure 3 and D and his 3 ball has been falling. However what has people excited about Luwawu is his rapid growth as a ball handler, not a primary ball handler but in the sense of attackong the defense to score.
He was already a good slahser and he runs the break well. He is very fast. However his ability to attack closeouts and even recognize the right pass at this early stage bodes very well for him at SG albeit off the bench or as a potential starter down the road.
Still I wouldn't rush out to add him in dynasty because the team can get real deep real fast in the back court next season as already mentioned. There are more sure bets despite his potential imo