Yeah it's mostly on point. I do think the one guy's take on Deacon St. John's personality (that he's this completely nutso dude) is a bit off. Doc Squiddy, having finished the game, does have a better idea of how it is for the guy. But yeah, he's definitely not entirely sane. My take on it was thus:
He has basically closed off the parts of his personality, pre-apocalypse, because to open those parts of himself up, would be too painful, and it would make him realize, and have to reflect on the tough things he had to do, in order to survive in a zombie apocalypse. But if he just seals himself off mentally, denies his emotions, and empathy, and just reduces his world down to him, his best friend, and their bikes, and fuck everything else, he can cope with what he has done, and continues to have to do. But, that just isn't feasible, it's a poorly thought out coping mechanism, that doesn't survive the opening sequences of the game. And so yeah, he's forced to confront his own demons, find a way to forgive himself for things, that only HE blames himself for. I mean he's hardly the only person in a world of survivors, that had to do horrible things to survive, but that's how guilt eats at you. We are quick to forgive someone fucking up in some way (that doesn't impact us) that they feel guilty for, but we are slow to forgive ourselves for the very same act, and ignore their claims that they don't blame us, and that they understand.
I think Sam Whitwer did a good job conveying this. I think one of the issues is the way the game structured his mental state, could be very jarring. For example. Yes, he is often very angry, and muttering to himself when doing missions. But, since the mission chains are independent of the main storyline (where he has actual emotional growth/closure), you could do them at any point. So they didn't script him having an emotional turn into the dialogue. So, if you, for example, go back to clean up an old mission chain (clearing out the zombies from this one area or whatever), he sounds like Day 1 Deacon, angry and violent and unhinged. Even though he has, at this point in the main story, actually resolved a lot of his baggage, and become way more chill by comparison. So yeah, it can be very tonally jarring. Whiplashing back and forth as you move around the map, doing the various quest lines.
Still, I do think it's a much better game than it looked like at first. Yes, Sons of Anarchy meets Walking Dead, is a very apt synopsis of the tone of it, and yes, for me, at release, that was not enough to buy it. But, it was definitely worth the 30ish bucks I spent for it on sale one day. I would say it was probably worth full price? But I can't fault anyone like myself, who thought it probably wasn't worth full price, based on the material they had at release.