While new signs of a potential ceasefire are always welcome, those who want this conflict to end should always be skeptical. While both sides have agreed to some concessions and even "holiday cease-fires" in the past, the Malaysian government is still closely tied to the military, while Thailand still hasn't touched upon the rebels' main grievances. Only time will tell if these new negotiations will pan out.
Both sides need to enter these talks from a deeper historical, economic, and cultural perspective. This includes the fact that the separatist movement is decades old, the ethnic Malays and Muslims don't typically interact with the Thai people, and southern Thailand is the poorest region of the country. Thailand needs to concede this reality, and the insurgents need to accept that Thailand is not going to split up its sovereign territory.