Allen does absolutely fine with Hewitt's offense once they get into it, it's getting the ball up the court under pressure and transition offense where he struggles, that's why he needs someone who can handle the press and lead a fast break.
But once you get into the half court, Allen is pretty damn effective.
As a scorer, yes, he's quite dangerous. He's worked hard to improve his outside shot and is great going to the basket.
Running the offense/creating for others? Hard to say that since we rank among the nation's worst in both assists per game and assist-to-turnover ratio.
Allen really hasn't improved his PG skills that much the past 3 years, and I think a big part of that has resulted from playing in a system that relies on primarily driving to score, not to pass.