there's a new specialization and to unlock it you have to go "do shit" like kill X of enemy type Y with weapon Z but it all seems kinda boring and pointless. there are also new ways to get blueprints i think. i logged in for 10 minutes, walked around, looked at shit, and realized i just didn't care and logged right back out.
these kind of GAAS games really have to figure out the problem of "I've been away from the game for a few weeks, forgotten everything, and when I log back in its overwhelming and far easier to go play mario kart than figure this shit out". I remember watching a giantbomb E3 video and they were talking to the Warframe producer and she gave some terrible, terrible answers ("we have quests that catch you up!") when GeffJ brought up the exact same problem he has with all these GAAS games.