I'm only guessing the game is broken at the same places on all the servers. Iron Marshes and Timberline are pretty buggy but Iron Marshes can be Map Completed 100%. Timberline is still has several broken events but only one can't be completed, Whispering Falls. There is a POI and Skill Point behind a door, which can't be open atm by the NPCs.
"Let's not focus on her. That'll be like entering a bad K-hole you'll never wake up from." Mr. Robot