@Cirith,
Overall, the PvP events are a lot of fun. It's interesting and open, and also rewarding. It's great to not be pigeonholed into doing minigames or Bori to progress in PvP.
There are just a few issues that could be addressed:
Arena of Death (Group)
The only real issue I've had with this event is the extremely lopsided number of people in teams sometimes. I know you stated that the system prioritizes groups, but it should have a limit on the maximum difference in the number of people in each team. It's pretty uninteresting when there are 6-9 Red team, 2 Blue team, and 3 Yellow team.
Chosen of Gullah
This one is a great idea, but it should be limited to a specific area, and whoever is Chosen should be hostile to EVERYONE, including guild and group members. This will make it progress much faster and be much more entertaining, as well as give more people the chance to get the buff, rather than maybe 5-6 people per Gullah event. The buff is far too powerful to be given to someone with an entire group or raid supporting them, and it's frustrating when the Chosen is some player off AFK in a corner somewhere. If the Chosen were to be hostile to everyone, the buff could even possibly be increased. Maybe just the damage.
Package Delivery is broken, it doesn't seem to work at all in Cimmerian End.
These are the only areas that should really be adjusted inside the events, I think. Aside from these, though, I would love to see the PvP festivals happen more often than one week per month, and there are a few general adjustments that would increase the fun:
-Less downtime between events.
-MUCH more description _IN-GAME_ about where the events are taking place and how to participate correctly. Noting the coordinates is great, but not all events actually do that.
-The issue with enemy targets being blue but still being able to hit them, if they are in another group of which a member of your guild is the leader. This is very annoying. I've wanted to drop guild many times since this event just so we could PvP properly. A lot of the groups are pugs, which is great, but it's frustrating when all of your enemies suddenly turn blue and you can't cast any direct spells on them. It becomes extremely boring because nobody can fight. Having a guildmate in an enemy's group should have absolutely no affect on enemies.
If you'd like any more detailed information on my findings, or if you have any comments, please post or PM me!