My understanding on Noah was that it was a midrash -- that is, a story told about and with the Biblical elements intended to discuss deeper (or different) philosophical or theological concepts. In this case, a discussion on whether or not human beings are worthy to be saved (or that is what I took away from it).
I think, in particular for this film, that some Christian audiences missed some of the point on what is, more or less, a way of telling a Jewish story--using a Jewish method of talking about Scripture. That said, I agree with Stranger and djoberg that the Hollywood aspects of any film often overlay the literary or other source material.
Still, PQ on Noah is very good and I think worth a watch for that alone, though I personally wouldn't buy it and probably don't plan on re-watching it anytime soon.
Former 35mm and Digital Projectionist @ Regal Cinemas
Currently watching on: BenQ W1070, 106" 0.8 Gain Screen, Darbee, PS4, w/ Yamaha Aventage RX-A1030, NAD C370 (for Front L/R), Outlaw Model 5000, SVS PB-2000, SVS PC-2000, a Def Tech CS-8040HD, 2 SM65 for L/R, 2 SM55 for sides, and 2 PM1000 for rears.