Sam!! ♥ Okay, cool. He'll still snark at him, but be considerably less mean about it.
I think there's an interesting connection to be made with Evan, because while Sherlock is generally overbearing to adults, he has a gigantic soft spot for kids. He'll be wayyyy more patient and willing to help guide him through the things he's been working on, particularly because he, himself, is neurodivergent, and understands feeling out of place.