A positive effect of the WED will be that its actions will not affect the relationship between states. After all, states are not the ones who will act against the state that violates the international agreements; the WED will act on behalf of all members, while the member states will just act according to their commitments to the WED.
Another positive outcome of the WED will be that states will not be able to abuse their economic or military power to force others to act according to their will or to accept a breach by them. After all, by doing that, those states are not only breaching international agreements but also intending to make innocent civilians suffer only for their own agenda. Indeed, just as we as humans may not force our neighbours to live as we see fit, states may not force this on other states, either.