We know who wrote the smuggler and trooper stories, seems like they are the current lead writers. Are any of the Imperial story writers still around?
Alexander Freed wrote the Imperial Agent story. Also, he apparently wrote a good portion of the Imperial storyline in Makeb. He left Bioware to go freelance in October, however he is fun to follow on Twitter as he seems to like to talk about the IA (and he writes DA and SW comics)
Neil Pollner is the writer of the Sith Warrior story. He is still at Bioware, but he is working on Mass Effect 3 right now.