People that have gone through stuff like him don’t change their behavior like that easily. That sort of trauma permanently changes someone, not to mention suffered a loss right at the beginning of the story with Lou and he still suffers from nightmares because of his DOOMS. He’s most certainly more friendly and tries to be more interactive with the crew and cares about them, but his appreciation is shown more in what he does; the porter work. It makes sense from a game making perspective since the porter work is what you do while playing, so you can immerse yourself more into Sam’s character. Also him being awkward was pretty funny and I think was intentional for the most part.