The way it looks right now the bulk of content we are getting is the stuff made before Rise of Iron which was hastily put together to fill the gap in Destiny 2's year delay. In RoI we got things like Hard modes of strikes with strike specific, desirable legendaries with effects that in D2 right now are exotic only tier stuff. Archons Forge to use item drops to spawn boss events for good loot, daily and weekly quests from npcs to get gear and relics that did things like mind control enemies to make them allies, give up your super for extra grenades and so on.
The common expectation right now seems to be Rise of Iron is representative of what is coming in Destiny 2. In particular Rise of Iron outright tells you Rasputin has a colossal army of robots far stronger than exo's and we know the second expansion is warmind focussed. So people are assuming Rise of Iron is what to expect content wise in updates and right now from the devs point of view this is stuff made last year after The Taken King and they spent the last year spread between Rise of Iron, Curse of Osiris and whatever the Warmind expansion is.