Not sure if you were addressing me or naomi there jim, but as I said before I don't profess to have a solution to this.
It strikes me, however, as bizarre, to think that some Assad is the man to "hold Syria together". Syria WAS held together for many years by Assad, and was tolerated for his repression, understandably, as was Gaddafi, Ben Ali in Tunisia etc. Syria was lauded as a stable oasis is a troubled region. But as soon as the people starting fretting over econoomic issues, emboldened no doubt by events in other parts of the repressive Arab world, he panicked, over-reacted, and showed that he had not the slightest idea how to unite his country.
He's killed countless thousands of civilians, driving countless others into the hands of jihadist rebels, seen his country break into pieces, and although he controls the main population areas at the moment, most of the territory of the country is outside his control. The only reason anyone at all is contemplating that he might continue in "power" is because he's always been propped up by the Kremlin, who stepped in when he was on the verge of defeat. Back then, he was prepared to negotiate as he was in a position of weakness. And the idea now must be to make him think again. Not "take him out" because his "tribe" if you like needs to be catered for and simply removing him would worsen the existing power vacuum.
But there are many "tribes" and it is grossly insulting to Syrians and simplistic to say it's simply "Assad or Islamists", "government versus terrorists" - that is the line spun by the regime. Understandably.