some of the big things that dropped with this update are.
-trading if only with your group and within 1 hour of pickup
-incursion/s just one at the moment "Falcon Lost"
-named bosses will always drop 1 yellow
-challenge bosses will drop 4 yellows (tested 3 times)
-gear sets for most builds they require a lot of crafting mats and PC to make and buy 1 blue print costs around 800PC
-weekly daily and dark zone daily objectives
-and this weird random dark zone drop event sever wide very fun very scary haven't done it
full on patch notes are here
http://tomclancy-thedivision.ubi.com/game/en-gb/news/detail.aspx?c=tcm:154-245851-16&ct=tcm:148-76770-32
-edit oh and gear score namely its used as a suggestion to missions to what feels like a way of pricing things. once you see it you'll understand what Im saying
-edit+ seems like the challenge bosses dropping 4 yellows was a bug and has been patched... now only 1