The problem, always, is separability of lethal and non-lethal damage. If the same hitpoint bar is used for both (as it is in most subdual systems) there will always be exploits, regardless of whether it's tied into PvP or not.
Another thing on the dice rolls, People stack those. seen a bluff 45, 50 intimidate. Often the folks that do are the ones that demand you use them. I don't think anyone here does that, but since we are allowing for the idea of abuse to happen there can be just as much dice abuse as CvC abuse. and I rather lose what i was fighting for RPing my char beaten crushed, then just bluff,intimidated, or persuaded, because someone rolled 2x higher then I can with a 20.
wekk there are fully working subdual system the on ethat bring you to 1 hp is fine, because if your going to kill the fella, you don't subdual you kill them, subdualing to bring them to hope a monster kills them is pretty pointless. It also the sub-dual system the majority of servers use. Trust me if you have it out for someone, and plan on griefing, which from the looks of this community I don't think anyone is, even on server where we allowed full CvC we never had any griefing through CvC.If someone is out to kill you, there going to just kill you.
And to the point of RP battles, there nice but sometimes you need to win a argument because it pretty key to the events that will happen in both your chars storyline, Players know when to use which, and is often a agreed on. Star just felt that death being the only option in the wilds as less then RP friendly. Because CvC should only happen when there a need for Rp, and often when there RP your goal is not to kill your foe but to capture them, teach them a lesson battle over possesion of something.