There seems to be a trend of distinguished videogame writers leaving BioWare these days. After David Gaider, who'd been working at the company for 17 years before leaving for greener pastures, Chris Schlerf has announced in a series of Tweets he was returning to Bungie after working on Mass Effect: Andromeda.
Bungie is not a new stop for Schlerf. He'd beenfor his writing work on Halo 4 with the studio. He started his tenure with BioWare back in November 2014 to work on Andromeda.