There's a good reason the talks over Sudan have failed in spite of the dire situation faced by the civilian population. Those involved in the peace process, from the Saudis to the Emiratis to the Americans, have a vested interest in the outcome of the conflict and aren't coming to the table with the purest of intentions. There will be no hope for negotiations unless the UN gets those with a geopolitical interest in the conflict to abstain from these mediations.