I really hope they find a way to attach Reg's arm back or fix it. I know, that they are trying to imply that progression is marked by the wounds they gain throughout their journey but this is irredeemable.
@Hacete holy shit, I didn't even think about that. It's probably more like the scars they receive tho --> innocent children to scarred, hardened veterans, (like with Riko's hand scar). So I think Reg will prob get the arm back eventually (or get a good replacement)