Atleast it doesnt violate basic fysics, the planes behave like planes. The basic story is of course, as most movies, very loosely based on a true story. (They use the name of a real plane but thats it). I dont demand films to be 100% accurate.
So your concern is that the airplane flying isn't accurate enough, but you aren't worried about the history.
So the notion that the movie loosely based on a true story, as Redtails, Flying Tigers and Memphis Belle are, in name only, are worthy only if the flying scenes fit your notion of accurate?
For me, if they get someone to pick up a book or search the web to learn the story afterwards make them worthy.
So we will have to agree to disagree