I would love to see an option to create, join and find world events with other players.
I suggest that world events are easier found, in a similar way to Dungeons.
As an example, in a world event tab, allow players to create, join and find world events. This would be public and where applicable there could be a cap on the active number of players, consider giving the event owner the option to close an event if he/she feels there are enough players.
These events could include: arenas, pledges, dolomen, world bosses, PVP group invasions, PVP group questing... these are just ideas, add more if you like.
I too would like to see more PVE and PVP world events.