We'd be much better served by a S.o.S with some diplomatic experience. This is no time for on the job training, plus Tillerson is being handcuffed by President Bannon/Trump who is trying to gut the State Department by underfunding it and understaffing it so, presumably, they can handle foreign affairs from the White House (via tweets and nasty rhetoric). Old hands from the Department will tell you that most of the critical diplomatic work is done by officials below the cabinet level but President B/T hasn't seen fit to fill many of those posts. This crisis is of Trump's making and the only solution is for him to back off (or ideally resign), throw out Bannon and get a competent Secretary of State and create a healthy and vigorous diplomatic corp. Of course, not much chance of all that happening.