This and only this.
They added the retainer venture, but it's not enough, they need to add more to it, like we can summon them in dungeons, or interact more with them.
The companion, why is it limited this much?
The map hunting, find a map, kill some trash mobs and that's it, why not make it like you need to get a hint from the map to do a dungeon or a raid, and build a story around lost people in this dungeon that we have to save?
its like they start something good, but put in hold for a long time just to create end-game content, more gear and more gear and that's it.