Syria as a colonial legacy should never be kept intact i m o, at most a confederacy. If not it is goinf to be whatever arab presisent in power killing the rest not affiliated.
The horror of ISIS had breeched some walls among those groups who live together in much of Syria that there is actually an opportunity for it to be better.
Especially if the US and Russia can find a way to somewhat cooperate.
In my opinion. (yes, everyone has those too)
But it is going to require they both put The Dog back on the leash.