You want to make sure that we remain flexible enough to insure that, if it is your choice that no war breaks out, we can implement that player choice
Its gonna come down to the playerbase essentially.
However, if they listened to the feedback before, maybe if the feedback is half and half, they will make the effort to implement both aspects, therefore adding what Nevrax would like in the game, and what players want to see in the game.
A few extra regions would help this. Both PvP and PvE, with higher levels to be gained, new mobs to be discovered. Therefore taking away the skill cap, and tribes of old can be discovered adding more storylines to the Saga. And being of ancient knowledge, reveal more about the history of the races and what they have discovered about the world.
Perhaps some of these tribes will not accept that new civilisations have began, and some will choose to be in conflict, leading to attacks on our current cities, or events where we attack their cities.
And in the PvP zones, and if such a war happens, perhaps Nevrax can implement the faction thing to those zones, allowing certain factions to control these new zones (but like i said, some of the zones, as it wont be fair on those who dont want to fight to not be allowed to explore new regions)
If they can do this, and provide an environment that expands the following..
Higher levels and new things to see for those old timers
PvP areas and a war based story for those who want it
PvE areas and a co-insiding story for those who want it
More ways to learn about the world, and the history.
..then it will be a fine path they are on. Cant deal in absolutes really, one choice or the other. Let it be a multiple answer.