What have I missed?
Gah, a lot of stuff. Don’t know when you actually left, before or after Guild Missions were introduced. We have an account wallet, an account wardrobe (with all skins now being account bound), new jumping puzzles, a couple of new meta events. You can’t access the Living World Season 1, but the Living World Season 2 has recently started.
There’s at least a revamp of AC and a new dungeon path of TA.
There’s some new minigames (Sanctum Sprint and Southsun Survival).
The Living World stuff is the big thing though…oh and new PvP maps and a brand new WvW map.
Edit: And check your traits, they should have all been reset.