i think this is to late to introduce, but to be honest if you make this had to introduce strength, speed, leaping, mobility(how you could change your movement) else you had to consider that they are athletic Centers like Howard who are still to slow to guard guards ...And you could make this with Skills, why have a single inside shot did it help that you could dunk when you make a hook shots and what did that have to do with layup. In the end you have something like 1000 Skills, who are still connected with each other.
So i like the actual try, that those are all included in still a bunch of general Skill and your imagination has to do the rest(like good Rebounders are strong and could jump high ...), and if you improve those ability there is also the atheletic training included.