I think there is a lot of moderate groups and individuals under HTS, that had no choice but to join the main body when they did takeover. Now there are substantial Turks on the ground in Idlib as the main force things will change and groups will be encouraged to join SNA. But there will be a certain amount of hard line nut jobs perhaps 15% that just want to fight against anything moving.
What to do with them? Bullet to the head is a good option and no, we can't send them to Libya. Perhaps the turks can set up a Turkish Legionnaires group once they have been evaluated?