There are some annoying bugs in this content patch. I was thrown in double encounters while doing the Queen's Gauntlet for my first two fights, so while my enemy was still Halmi Hammerfell, there was another player inside and Windcaller Kieldia. Very confusing, but it never happend again after the first matches.
The queen's champions are another thing. They can easily wipe out smaller towns if you kite them a bit. I found this out in Fields of Ruin, where there are friendly NPCs everywhere. They are hit by the champion's attack and try to defend themselves, unfortunately they don't live long. Had some fun with them in the Summit Peak tent.
Also, I like how events are corresponding with each other, saw some escort events parallel to escorting emissaries to hot-air balloons. NPCs helped each other with all the mobs that spawned for both events.