I presume, Ag, that you are aware that the phrase 'Middle East' in Blair's title is a misnomer. His role is concerned solely with the Palestine/Israel conflict. Many seem to imagine that he should be flitting from Syria to Iraq to Egypt, to Sudan, to Yemen to wherever in that region trouble flares up. He should not.
Given that the Palestine/Israel conflict dates, in effect, back to biblical times and that absolutely no one has managed to solve it in thousands of years, one shouldn't be too surprised that he hasn't either!