The thing about Cody Williams' size....when you measure out the weight to height ratio, it's no different than KD being 185 lbs, as a 6'11" player. If the knock on him is weight, it's a poor one since that is easily fixable, especially as he's already athletic and well conditioned and therefore, the bulk is less likely to interfere with endurance.
If his shooting never pans out, I do see him as a better Darius Miles. Athletic and fluid with ball handling, elite in transition and capable of attacking the rim. Higher IQ, better FT%, better mentality, better defensive effort, and better playmaking potential than Miles but maybe not escaping the 15-18ppg zone that Miles would've been in modern pacing.
Just about every single draft, there is an All-Star at the #7-14 position. Perhaps a better Darius Miles that can shoot could look like Paul George in a few years.