It really has been and still is for some hours, EPIC fun! You should try it Vali, you got access to it all on f2p during the anniversary.
One thing that could have been slightly better and something to consider if it is made more permanent. Reward people for participating, also if they happen to get ganked. It is so easy to grief people in a mass fight, its fine but please reward everyone for participating, also the victims!!
Also, make an overflow quest journal as we got one for rewards when inventory is full. Many people missed out on rewards because their journal was filled.