12 is deeply compassionate. He's just not shallow or mawkish about it. He doesn't emote it loudly, but subtly, in eyes, twitches, sotto voce. He isn't always tuned in to human social stuff, but compassion and empathy aren't the same as social skills. 'do you think I care for you so little...' I don't mind him showing a lighter side in S10, after all that angst, but I don't expect - or want - a change of hearts.