Aaryn Flynn, general manager of BioWare, tweeted this in response:
For fans of BioWare’s Dragon Age series and Knights of the Old Republic, this is a sad day. Gaider was responsible for many fan favorite characters – including HK-47, Alistair, Morrigan, and Fenris. Not only that, but he also played a major role during the creation of Neverwinter Nights and Baldur’s Gate.
Dragon Age, however, was Gaider’s main focus, as he was a major factor in the plot and creation of the series. He also wrote various tie-in novels and comics for the franchise, such as Dragon Age: Asunder and Dragon Age: The Silent Grove. And in case you didn’t know, Gaider is responsible for Dorian from Dragon Age: Inquisition – arguably the best character in the game.
We should hope that whoever replaces David Gaider will do just as good a job as he did for the past 17 years.