Hey, more Lando! He's getting more character development. Good, he really needed it. He was the least developed by far. He's definitely the "good guy" in the group.
Luke and Jack do love Lando. They're just not that great at showing it. That's what Alix is for.
Hey, I believe it. Their reaction is a tradition guy reaction. We love our buddies, but we're more likely to shake hands or pat each other on the back than hug. Obviously, Jack is only in on the hug to impress Alix and even then he looks uncomfortable. And they even look a little sorry that they didn't get him a gift in Panel 7. We guys just don't do Public Displays of Affection with our buddies.
All in all, Great Job! Your characters are all coming into their own and showcasing distinct personalities. You can even tell in this comic by their mere expressions and body language what they are thinking and what kind of people they are.