Now that development of future Halo games is being handled by Activision Blizzard’s hands, some former developers of the series have spoken out to share their thoughts on the shocking but not entirely surprising mix-up. This includes the former franchise creative director, who has provided some salient advice to the Call of Duty publisher. Frank O’Connor has worked on Halo for over 20 years, first working as a writer and community manager before serving as the game’s franchise creative director…