I agree that his limited playing time does make it hard to say whats a "streak", whats his "norm", and whats his ceiling. I think the jury is (or at least should) still be out on AB. Hes shown flashes of greatness, and also periods of horrible play.
Whst I always get stuck on with him, is his size, and skillset. The fact is he doesnt have the ball handling or passing ability to be a successful pg at this level. That experiment failed. When he was given Rays minutes at SG, he seemed to flourish (offensively). However, if you give him starter minutes at SG, the other team will have size advantages.
AB has shown himself to be an elite defender OF POINT GUARDS. Against SGs though, he's decent at best. Yes, his athleticism will lead to some highlights like the Wade block, but there are many more instances (like when he got matched up against gerald henderson, gordan Hayward, and Joe Johnson to name a few), where the opposing SG simply is too big/strong for him to handle.
So we have a shooting guard who is elite at guarding point guards...but, if we put him on their PG, then our PG has to match up against the other teams SG =/ IMO any team with 2 strong players in the backcourt (Knicks, Nets, Sixers) can all cause us problems.
If ABs shot really is as strong as it was at his best last season, then I can see him having a very bright future. I'm just not sure if thats going to happen, and if it doesnt his size will always be a disadvantage.