In my honest opinion, the blue tint looks unnatural. Something in-between the Blu-ray grading and your version might look better.
All i’ve done is remove the blanket yellow tint that was there on the Titanic 3D blu-ray and boost exposure slightly.
I don’t think its my place to subjectively decide that I would prefer the film to look warmer and reintroduce some of the blanket yellow tint.
I personally think it looks great and is a big improvement over the blu-ray, whether people like the colours found underneath the blanket yellow tint though is entirely subjective of course, my releases just offer the option to watch these classic films without feeling like you’re wearing yellow sunglasses.