Did Amy Hennig really leave Crystal Dynamics?
Yes, Amy left Crystal shortly before Defiance shipped for the PS2 and Xbox in order to take a job as a game director at Naughty Dog (the developer of the Jak series). She worked extensively on Jak 3. Later in 2004, Richard Lemarchand and Jen Fernández also left the company. Richard works at Naughty Dog now, and Jen has moved on to non-gaming-related work.