Anchorhead said:

see you auntie said:

This was directed by Anthony Hemingway in the same manner as Richard Marquand directed Jedi.

Unfortunately, that's true. Here is an excerpt from an Entertainment Weekly article addressing that very issue.

Lucas, who is also producing and financing, needs reshoots and must do them himself. According to two sources close to the project, Hemingway was hoping to stay on for the redos, but was already committed to direct episodes of David Simon's New Orleans series Treme for HBO. (Lucas wasn't willing to wait.)

Lucasfilm confirms the directorial shift, which FirstShowing.net broke, but denies any conflict with Hemingway, saying Lucas and producer Rick McCallum will oversee the reshoot — with Hemingway's approval

With Hemingway's approval. Sure.

If they're scheduled reshoots can't you just schedule them to a time when the director is not shooting Treme?

Here's a quote from Daniela Ruah who's an actress in the film movie:

http://collider.com/daniela-ruah-interview-ncis-los-angeles/52411/

Daniela: That was a wonderful experience, mainly because it was my first big film. Just to be able to work on something that came out of George Lucas’ mind was quite an honor. Initially, it was directed by Anthony Hemingway, and then George Lucas wanted to change some of the tone of it and decided to direct it himself, so we had a few re-shoots and I got to work specifically with George Lucas on those re-shoots. That was really special, to see how he works and to see what the process is. They only had me for a weekend because I was shooting the show, so everything had to be on the ball, at all times.