Not an expert, but I assume the Syrian turnover will result in a long period of instability

[Igel]

7. In a way, that would make sense.

But be massively destabilizing.

Turkey wouldn't allow a Kurdistan because then Turkey's Kurds would have a more concrete goal--as would Iraq's and Iran's.

Would it be Sunni? What about the Alawites? Until a few decades ago they weren't really Shi'a but were instead heretics--then Iran suddenly needed solidarity for its neo-imperialist goals were reframed as a branch of Shi'ism.

Would Turkey annex the islands of Turkomen ethnicity resulting from the initial migration and occupation of Turkey 800 years ago (with bits from colonial resettlement under the Ottomans)? What about the intervening bits to make the territories continguous? Ethnic cleansing?

And the Chaldeans and other minorities-among-minorities? And does economic viability matter?

I got no solutions. Just a list of problems that blocks any solution that doesn't sound remarkably Swiss, but even that requires a certain large element of shared cultural values (and that's a problem).