I'm not really complaining here, I merely voiced my personal concern with the state of things (current and past) and proposed a solution - either remove Cordor from any further conflicts by removing PC representation of it as a settlement (this means that there would not be any PC magisters, guards, chancellors or whoever who could start conflicts with other factions - if they want conflict, they can do it as an independent faction on equal footing with everyone else) or introduce a simmilarly large and powerful settlement as a counterweight. Is this a fantastic optimal solution? Is it even necessary? IDK. Worth considering? Maybe, dunno... brainstorming here, really.
Firstly: I know it's not a complaint XXX, you're awsome and this is just a fun discussion!
With That Being Said I will adress your points.
1) Removing pc representation from Cordor would not change anything. This decision was more pushed by the NPCs. If anything this is an argument for removing PC representation from ALL settlments I suppose, but just one makes no sense.
2) A similarly large and powerful settlment as counterweight? We have that. It's called Andunor.
The problem was less 'Faction X was attacking Cordor' and more 'Wharftown was at WAR with cordor.' And had been, on and off, for a long time. And recently had been doing it so often, so heavily, that some npc response was required.
Consider this scenario.
One day in Guldorand (or pick any settlment really) a High level pc enters. He kills lots of npcs, finds your pc, beats them down and kills them.
Next day he comes back again. Again killing npcs, finds pcs, kills them. Then raises one and subjects them to vicious torture inside city walls, in front of guard npcs. Then leaves
Next day he comes back again, killing more pcs, doiong more torture, killing npcs.
Next day he does it again, the pcs arn't strong enough to stop him. More pc and npc deaths occur. He demands to be named King of the Settlment or he says he'll continue.
Next day he does similar, again more demands.
All the time he is in no way disguised or hidden. He is utterly open with his identity and happily does things in front of npcs, ignoring them entirely unless he decides to kill them on a whim.
After a while, I would imagine that the pcs would get a bit miffed at this. Is the answer:
a) 'This guy is a higher level than you guys and better at pvp. Sorry you're just going ot have to suck it up and hand over the settlment to him.'
b) This guy is metagaming the guards, the city and all other npcs. The city should really react to this one nutso entering the place and murdering/torturing people in braud daylight!
As a DM, I lean on option B personally.
'Hold on,' You say, 'Hold on, in that example - do you mean that no one can ever do pvp in front of guards at a city?'
Now for me, personaly, I'd say - it depends on the sitation, on what you're doing, and how often you do it. But if you're doing it openly and constantly then yeah, the npcs are going to react.
But this is basicaly what Wharf was doing. They were hitting cordor over, and over again, ignoring the npc presence entirely. If they'd done it once or twice, or if they'd been clever about it, then it would have been fine. But there comes a point when, just like in the above example, npcs will bite back.
This too shall pass.
(I now have a DM Discord (I hope) It's DM GrumpyCat#7185 but please keep in mind I'm very busy IRL so I can't promise how quick I'll get back to you.)