My worries with him are entirely on the defensive end. You guys remember how every PG used to torch the Shaq era Lakers and everyone blamed it on Fisher? The reality of the situation was Shaq was too slow/disinterested to defend anything involving a switch. The entire middle of the court was always just available for the opposing team's PG to do whatever they wanted.
This is the entire modern NBA. Ball handling, guard driven pick and rolls. It's the reason why a player like Kevin Love, despite being a better man defender than people give him credit for, just won't ever excel at team defense. You have to shield these guys with a whole lineup of long and athletic defenders (Cavs go a long way to do this with TT, LeBron and Shump), but good teams will still look to exploit it. They'll still draw Love/Okafor out and force them to defend and these types of players just can't hedge or blitz those screens to the level necessary. Add on to that the fact that Okafor's strength will be in ball stopping, iso situations on offense and you end up having to add shooting to the previous caveats of long, athletic defenders.
This is the whole reason Russell is the obvious pick. A guard with his scoring/shooting ability combined with what is legitimate 'run an offense' level court vision is essentially the prototype of what every team is looking for to base a team around. Low post scoring isn't just rare because these prospects don't come around as often, it's also just a far less efficient way to play basketball in comparison to plays that cause movement and switching on defense.
You can look at a team like the Spurs and see the very natural progression of what the league once was to what it is now. 5 years ago they were an inside/out team centered around Duncan. Today they're entirely based on motion, passing and mismatches (all with essentially the same core in place). You don't see plays where they give Tim the ball and ask him to score anymore. It's far more efficient to work the ball, force the D to move and get an open shot.
Just my opinion, bros. But I think Russell transitions much easier and faster into the modern game. He's much more of a prototype for today's league than Okafor.