Not very happy with what I saw in that (leaked?) trailer. While grass shadows, SSAO and better lighting in some conditions are nice, the overall darkening of the environment coupled with some inferior texture reskins (nanosuit), missing texture and just model anomalies makes it look worse on many fronts.
It's good that they're delaying it to continue improving upon it, but it seems that my prediction that it would only marginally look better is coming true.
Also, I don't really like the new SCAR sound. The original was a bit unique, the new one sounds more generic.