I was trying to find out who might be writing for the game and it seems that all Obsidian's narrative designers are already involved in other projects.
Josh Sawyer - Not involved.
Carrie Patel - Directing TOW DLC.
Kate Dollarhyde - Working on Josh's project.
Paul Kirsch - TOW DLC.
Conor Walsh - TOW DLC.
Kelsey Beachum - TOW DLC.
Nitai Poddar - No one knows (probably TOW second DLC).
Megan Stark - No one knows (probably TOW second DLC)
The only person we know is Lucien Soulban, who was hired 5 months ago as Lead Narrative Designer from Ubisoft, but I doubt he is the only one writing for Avowed.