Actually, based on discussions I've had with TraceyG while shes been developing her mission pack, it's quite possible to set up custom victory conditions and custom DV shifts for victory conditions.
That said, your suggestion is entirely impractical. We don't have the player base to make this work for a server. Now, it has been suggested that PvP missions should have a higher DV shift than misions against AI, but this has not been gotten around to.