For anyone like me who tried to load the old save for the 0.17. A warning will pop up.
After loading the save, it may kind of work at the first glance, quests with characters joined later in game will trigger.
But at the same time, quests happened fairly early in game will trigger too. The story telling falls all over the place.
At the end, you will stuck at a place where many quests will not proceed due to many flags can no longer be triggered.
Better start the game new or you will stuck at the same place as me.