There's a few other things.
Multiple new invaded missions. Every mission has an invaded version now, though it's on a weekly rotation for now. They've added at least one new side mission in WT5, a new Conflict PvP map if that's your thing, two new exotics (though the LMG is sort of a bust) with the sniper being a multi-week side quest of sorts that requires you to complete the invaded arc each week, heroic mode if you find yourself with a pretty prepped premade group. There's also a new NPC side quest-ish thing where you hand in a drop from the Tidal Basin boss to the NPC. No one knows what it unlocks yet, but the NPC moves around the map each time you give her one. There's also the apparel event which I'm enjoying well enough, WT5 challenging missions are giving me enough exp for nearly two levels each run and field proficiency caches had their apparel key frags buffed by nearly 2x.
For an initial content patch, I'm happy there's as much as there is.