In May, Paradox Development Studio announced that Civilization 5's lead designer Jon Shafer joined the company. However, a short six months later it appears that Shafer has left Paradox due to "creative differences."
"Jon is an ambitious person with a lot of drive and passion and he has led some good discussions in our team over the past few months," said Paradox executive vice president of studios Mattias Lilja. However Lilja reiterates that creative differences led to the "mutual decision that it is best to part ways."
It isn't clear what Shafer was working on over at Paradox, though considering Civilization 5 is one of the best received Civ games, it would presumably leverage the talent of one of the designers behind it.
Until then, Shafer is currently working on another project called At the Gates at indie studio, Conifer Games.