I agree that Bowe's motivations do not remotely appear to justify his actions. However, given Serial's first season's infatuation with ambiguity, I trust that there may be more to this story that Koenig & Crew haven't explored yet.
Before now, I wasn't too familiar with Bergdahl's case, but thought it's broad strokes would make suitable material for Serial's sophomoric season. After listening to episode one though, I'm mostly curious whether this story has as enough intrigue to unearth via investigation. Serial season 1 was, in my opinion, a diary of journalistic doubt; As of yet I don't know if Season 2 will have much procedural connection to Season 1, which is a shame, because it was what I connected to most in S1. Not to say I'm "disappointed" so readily... I'm actually pretty excited the podcast medium can include such provocative subject matter.
I'm just hoping, given Koenig's closeness to Adnan's story, that Mark Boal is conducting the interviews with Bergdahl, and that the subject matter doesn't immediately invite micro-observant journalism, that Serial doesn't lose its personality. I want to feel the uncertainty of the hosts and the issue they've decided to cover.