IMO, you can blame Ig's lack of shots on AI. Andre has all the skills to be a superior player in the league, the only thing holding him back was that AI would take all of the available shots.
Being younger and less experienced and more of a complete all around player, Andre deferred to AI. Without him around, Andre is forced into trying to make things happen. As he continues, he will develop greater confidence in his abilities and teamates.
You could argue that MO should have forced Allen to share the ball, but when he was putting up 7-9 assists a night, it's hard to blame him for being so selfish. If your AI, and no-one is open, you break down the defense, you don't pass it to another player.
I'd be worried about the Sixers starting to win, but last night the Celtics were without Paul Pierce and Wally. No worries, the lottery pick is in our sights with the worst record in the league. A long stinking season awaits.