Really looking forward to Red Tails!
From what I've read, pre-production is the only thing that was really troubled, as it started in 1988 (!!!). However, once a cast and director were in place, things went smoothly. Effects look great, cast looks good and the director has a strong background (The Wire, True Blood, Heroes). I also love the logo.
Anthony Hemingway directed the film. During reshoots, he had to direct an HBO series so Lucas stepped in and directed the reshoots, which basically fill in the gaps and fix scenes from the original shoot. It's a relatively small process, so no fear of dueling directors. I watched a web doc on the Revenge of the Sith reshoots, looked like Lucas loves that phase of filmmaking so it should turn out quite well.