He has a ton of glaring flaws that are actually terrifying on the NBA level. He can't penetrate, create his own shot, draw fouls, or run the PnR leaving him pretty damn useless in the half court outside of catch-and-shoot 3s and the occasional step back which isn't a good thing to rely on. He's one of the better transition players I've seen in a long time, but he'll get punished defensively and won't give you much in a set. He has a lot of upside, but there's an insane amount of bust in there too.
That being said, he's probably still the 3rd best prospect in this class behind Fultz and Jackson.
Sixers bloggers have been writing pieces saying he's really a 2.