The word on BBC Radio 4's today programme is that Obama has said that he will not start a proxy war with Russia over Syria. So there we have it, an effective burn notice for the so called moderate opposition.
Hardly a surprise though and no surprise that the FSA and similar are target no:1.
The US and allies have always wanted Assad out and the current change of mind is simply a pragmatic approach to the reality on the ground (applaudable in its own right) in which Assad is seen as the lesser of the two evils.
The risk; as I am sure that Russia and Syria would see it, would be that any subsequent change to the reality on the ground (Russian coalition defeat of ISIS) could just as easily reverse and at a time when the Russian/Syrians etc will be tired and stretched from a long and hard campaign against ISIS and during which the FSA could be rested and reinforced/requipped and able to restart their campaign from a strong strategic position adjacent to the pro-government heartlands.
No commander worth his salt would leave such a potential threat on his home flank and it makes perfect sense, militarily politically and geographically to hoover up the minnow rebel groups on the periphery, before starting a concerted effort against the main enemy along its full nation wide front and to do so with full strength and without potential distraction/weakness in your rear.