You wouldn't want any other developer getting their hands on it and adding things that didn't make sense because they didn't know their Fallout, so people need to give them a break.
Most of the guys that created Fallout left Interplay before Fallout 2 was half begun... Most (not all) of the guys at Obsidian who worked on the series, worked only on Fallout 2 (or on Van Buren) ~they did not create the IP.
The Art director for Fallout is now working for Blizzard as the 'world designer' on Diablo 3'. He designed Fallout's retro 50's theme, Vault boy, and the BOS power armor.... He was also the Lead Artist, wrote and edited dialog , designed quests, did Concept Art, did 3d Modeling, and did the cut scenes. He had no involvement with FO3 or NV that I know of.