The events are really fun, and you guys did a great job fixing a lot of the issues experienced on Brazil for this last one. My suggestions:

1) Both of the events were too long. Make them 2 or 3 days max. I know you are doing this.
2) Space them out more! 15 days till the next one is WAY to soon. Lots of players throw tons of their time and energy into them, and having them this often risk burning everyone out. Spacing them out longer allows for everyone to recover and it builds lots of anticipation and excitement for the next one and you lose all that if they happen all the time.
3) Also as has been said many times, make it where either only the leader and officers can declare war or have it show on the screen who declared it. It hasn't been much of an issue with my faction, but I know for others it has. Just takes one guy being a troll and going rogue or thinking it's funny to ruin everything for the whole faction.
4) Show stats for wall hits and Power Attacks. These are often valuable efforts to the faction and the players doing them need to have it show for them so that everyone knows they are doing their part.