Agreed, he's shown a surprising depth and likeability this season, even if he'd still like everyone to think he's a jerk
Not sure why he gave up the fire totem at the end... out of all the others who were using them (not counting Amaya and Zari as they were original bearers) I* though Mick was best suited to keep his. We've seen that he's not just a pyromaniac, he respects fire (even while being fascinated) because he knows how destructive it can be. I was sure that they would have him keep the totem because I swear I saw his gun get destroyed.. but then it re-appeared?
Looking forward to next season to see what dynamic Constantine brings. No flirting with Captain Lance now that Sarah and Ava are (thankfully) back together, but I suspect Garry may have a little crush on him. At the very least they've got a bromance going on since the D&D game-night!