Wretchard,
(If you prefer that title still?)
The advantage of your scheme is that it extracts the whole Chapter IV and Chapter V mechanism for UN sponsored Peacekeeping/Enforcement War-making powers. The current problem is that we have allowed academic ignoramuses and European diplomats who should know better to construct a monstrous inversion. Instead of saying that the UN may exercise collective force at the behest of the united will of the allied principal powers of the Security Council we now have a situation where the UN officials and others claim that, despite the inherent article 51 right to self defense in situations where the UN is unable to act because of disagreements among the Powers, those Powers are themselves precluded from acting without the authority of the UN. Of course this is only meant to restrain America or justify dithering inaction by Europeans. It doesn’t restrain other nations acting as they see fit, for example the French in Africa. The source of this nightmare goes back to the Uniting for Peace resolution that America forced through the then Western dominated General Assembly when the North Koreans invaded the South in 1950. We shouldn’t have done it and have paid dearly for it.