I honestly worry more about Okafor's passing ability than his defense. He needs to learn to become effective at finding open guys with all the touches he's going to need and all the attention he's going to draw.
I like guys like Nik Vucevic and Greg Monroe because they are capable and willing passers. They don't end up gobbling up as many possessions as Okafor does.
As talented as Jah is, the Sixers are significantly worse offensively when he is on the floor than when he is out of the game.
All his flaws can be worked on, he's still real young. I'd just rather have someone else if I had my druthers . . . like Nerlens Noel.
I think his lack of passing has a lot to do with his teammates and how they aren't winning. He showed to be a willing and capable passer at Duke and I think that will come back once he is on a different team.
IMO he's going to be significantly better than Monroe or Vucevic overall.
Okafor is a much passer than Vucevic was at a young age.
It's only in the last year or so (24 / 25 years old) that Vucevic has been even an average passing center. Before that, Vucevic was a hindrance to Orlando's offense because he could not be relied upon to make basic passes from the high post. Orlando's offense would freeze whenever they passed Vuc (or other Magic big men) the ball.
Okafor is having the same problems as just about every low post scorer rookie has had coming out of college to the NBA. Double teams are much quicker in the NBA. He is getting doubled by much taller longer more athletic guards and forwards. It's harder to make passes. NBA teams are better at mixing defensive coverages and giving post players different looks. It takes time to adapt to that. All young big men go through this. All low post scorers. It's very rare when a low post scorer comes in and is a good passer out of the post as a rookie. It's just so different in the NBA from college.
Then you add in all the spacing problems Philly has gotten and that that Noel - Okafor partnership is just downright terrible for either one of them on offense.
Okafor showed solid passing in college and he is right were he is supposed to be in terms of his development (as a passer) as an NBA rookie.
I see nothing to be worried about in terms of Okafor's passing at this moment in time.