I like what they did with the lighting in a lot of the scenes they have shown (as in change the time of day), but that video they showed compared the Redux version to the Xbox 360 version of Metro 2033. The real game at that area looks pretty OK still, just less "atmospheric" than Redux since it takes place at day time with clear and barren weather.
I do like the changes they have made in a lot of the artistic directions (the character models, the new weather), but I only hope a lot of the nice effects works/ material work of 2033 is maintained in Redux. Furthermore that their SLI supoprt is way better than LLs (which is terrible in omparison to the perfect scaling of 2033).
The colors in the PS4 version are more correct to
what the designers wanted. The xbox1 automatically increases saturation and dark levels.