That new color scheme and contrast looks really good. Same with the wounded shader, it should bring FH2 closer to modern shooters. (In good and bad. Something familiar for new players, but on the other hand: "bloody screen, so real!")
I'm a bit skeptical about the film grain effect. In general I dislike the effect (much like excessive blurring in some games) and if a game has film grain, that's the first thing I turn off in the settings. You can quite clearly see it in the teaser and it's a bit bothering. Perhaps I'll just have to get used to it.
The new running sound is a bit weird, there's an annoying squeaking sound and it reminds me more of tank tracks than running.
The end effects to the FH2 logo are really awesome in the teaser!