Yes I understand what you’re saying and it’s interesting but the point is: in PvE-C no one already has a well-positioned base (in PvP terms), nor he farms manifestations of zeal to summon god bubble or avatars nor have raid resources like explosives or trebuchets because all these things are totally useless in current PvE-Conflict.
If you start a new game mode this way it will be wonderful I think 
But already playing peoples wich have bases like this one, will never accept to do a war just for fun losing all these things.
I’ld love to be able to declare wars, but I never built something like that if it was an option, I had built a PvP-style base instead.
