They need more world content outside of FATEs (bleh @ FATEs), and Hunts. Hunts can be fun. Treasure Maps are nice. I also gather to get more out of the zones, but I'm sure SE could come up with more content to do out in the open world. So long as it's rewarding. And no, the sightseeing log is barely content.

Although it's arguable how good the content was, it was nice having things like Verminion and PotD added throughout HW. I'm looking forward to what they bring in the major patches throughout SB. Hated Diadem though. The areas were too meh and it started out as a chore/RNG exercise, especially after they nerfed it. What I want is to have reasons to explore the new areas they already added (like with Hunts), not go to more instances to do some sort of grind like Diadem. More things to interact with in the zones would be a good start. More solo content and maybe even expand Companion options some more to run through the content with.