The patch is mainly made up of bug fixes, but it does have three key areas of improvements to gameplay. There's a big focus on melee combat, how responsive/unresponsive it is with the various melee tools, and how melee behaviour interacts with sprinting and other animations. The end result should be faster attack speeds for the knife, and clearer wind-up animations for both the knife and the sledgehammer. The timing dictating when melee damage gets credited has also been made more consistent in different environments.
I've played a lot of zombie games, and while I often enjoy them a great deal, rarely do I find myself stopping to gawk at the scenery. Setting a game like this in the Swiss Alps is fantastic. But even if this game was set in a much less pretty locale, I'd still be super into it as it feels like the culmination of a decade-plus of Techland making these kinds of RPG zombie adventures. Just don't pay too close attention to the main story.