The work continues.
I would say the main quest is reworked in 1/3. Story is gonna be more or less the same, but waaaay more expanded and it will start at planet 1, at the beginning of the game. The player will visit some new locations, like the Red Palace on Teneria (screenshot). There will also be new cut-scenes where things explode or something equaly important happens.
Side quests and common NPC have been reformed on 1/11 main planets. NPC after the update will talk more and will give quests during conversation, like in a normal, self-respecting rpg game. This is the most painful process. Conversations take a lot of time to make and there is also a lot of robotic work to process the old quest system into new multi-quest journal. But 1 planet is now completely reformed and it works perfectly!