They Still have Tim Cain, Sawyer and they can easily just hire Gonzales and Fenstermaker as writers for a project. Scaling up for big projects is like routine for game dev studios.
Unless Microsoft does some changes in the creative department I don't have much hope for Fallout. However, if they have Obsidian make a new Fallout and bring back some of the talent behind the older Fallout games I may have some hope back.