I love this type of events, it is a step in the right direction.
I was wondering, would it be possible to have smaller arena for 1v1 duels too?
It could have a cool feature of vouchers betting. To enter each player would have to pay same amount of vouchers, winner takes all.
Also, it could be nice to host server wide ladder tournaments. Top 16/32 players would have a chance to win something nice, obviously the higher you get the more you receive.
When it comes to things I could see improve is kills farming - it is now possible to join party and see friends location. They let you hit them and they dont usually take more than 6 hits. I know people want free and easy exp, but instead of how it works now I'd prefer that the higher you score the bigger your exp modifier will be. This will make players even more active and willing to perform as good as possible.