There was a decent point to be made that they should have gotten more of the political stuff (which they've been covering as of late) out of the way earlier; there was a concern for a while that all it was going to be was a "please please don't put Bergdahl in jail" piece when actually it's become more about some of the consequences of engaging in a long-term war with an all-volunteer army (at least in part; there's also a lot about the issue of politicizing the army and not a little bit about how the hell do you manage to survive 5 years in captivity). Bergdahl, in short, has a near-textbook case of schizotypal disorder, previously washed out of the Coast Guard, and in short never should have gotten within 10 miles of getting into the Army. His return also signaled a new direction that the Obama administration attempted to take in Afghanistan and which was only partially successful, in part because the driving force behind it died of a heart attack.
I'm finding it interesting, although not as good as the first season. There isn't the personal relationship between Sarah Koenig and Bergdahl the way there was between her and Adnan (in fact, the only access to Bergdahl she's had to date come from a series of interviews he conducted with the guy who wrote Zero Dark Thirty and The Hurt Locker), which I think is an especially big blow given that one of the things that's come out is that everyone who has interacted with him has come to the conclusion that he doesn't deserve to be placed in military prison for extended time. The other bit, of course, is that there's really very little mystery here compared to the first season: Bergdahl did what he did and nobody is really disputing the facts of the case (there has been some dismissal of some of the more UL-y aspects of the case, such as this idea that he was actively fighting for his captors, or that he wasn't really a prisoner at all, but I get the sense that these were never seriously believed by the powers that be in the first place). Still, you *do* still get a good idea of Bergdahl the person with all his good and bad parts, and if you don't *quite* understand why he went DUSTWUN, I think a good bit of that can be chalked up to the personality disorder he faces.