Bethseda should let Arkane do a TES spinoff, that studio has proven they have world design down to a tee, while the least said about NV in this regard the better. As for Failout spinoffs, I'd rather see them let Shinji Mikami take a shot at it. The Japanese take on post apocalyptica is varied and broad (ideally something ranging between Jin-Roh, Ergo Proxy and Blue Gender).