I wouldn't be so sure about the playbook concerns.
What I've seen over the last few weeks is that he's playing faster - you play faster when you are comfortable in knowing what you're doing. This is where the challenge for the coaches comes into play - do you keep a player on the boil and not put him out there until he has shown in practice that he knows what he's doing across the board? or do you throw him to the wolves and see what that gets in return.
In relation to those players who flash in practice/preseason, but perhaps show concern in other areas - I'm always a fan of throwing them in at the deep end because it can help steer discussions with, you have to work on this, that and the other. And sometimes, players are a better game player than practice player.
But it seems to be a trend with this team - even the likes of Cam Wake who sat for a while, when a of folks thought he should have been out there earlier.
Sometimes you just have to let Talent go and do it's thing - or try and let it go do it's thing.