The main discussion seems to be regarding safe zones. Some players are imagining 'safe switches' that can be turned on and off. That's not part of any plan.
I am considering allowing tribes that want to war sooner than others to remove their safe zone if they so desire. A separate zone (as the mist clears) or server with no safe zones at all is also under consideration depending on the world's population.
My goal is not to impose new limits as solutions but to give more choices.
I understand clearly now, thanks!

After reading this I don't feel like there needs to be a seperate server, but that's up to the rest of the community to decide.