I don't know what Obsidian is doing, but I've seen a few studios hire to do multiple projects, then have those multiples fall through, resulting in a surplus of talent at the studio with a scarcity of work.
It seems a number of these individuals were involved in New Vegas and DLC. Is some of the DLC being cancelled? I think it's too early for them to have actually completed it all. Maybe they have completed them enough to lay off some. *shrug*