There's plenty more that's new like grenades can be dropped, a new map for Danger Zone and various map tweaks. Deathmatch also got updates to let you pick between different modes of Team vs Team, Free For All and lastly Team vs Team with your individual score counting (the classic way for CS:GO). With this update you now get to choose what you prefer between short matches (score 9 rounds) and long matches (score 16 rounds - the classic mode).
One thing that might help pull in more people is a change to how long competitive games can be.
It's a nice blend compared to how they've previously done it. Some need to be done in a specific order, while others give you a series of thing to do in whatever order you fancy doing them in. You now get given a more varied set of missions. The mission system has been tweaked this time around too.
There's also a way to now play with a Steam Group in these matches too. What's actually new? Quite a lot! Including a whole new queue system to allow you to play special private matches on Valve servers, which come with special queue codes. YouTube videos require cookies, you must accept their cookies to view.