Hmm, I think my main reason against it is because of depicting Christ visibly - it becomes idolatry.

Otherwise, like you, I can see that a faithful account from the Gospel wouldn't be a bad thing, and I do think that despite the 'problems' with this film, that God will work His purposes out such that it will probably at least stir up people's thinking to consider who Christ is, and possibly seek out the truth from the scriptures. See Philippians 1...