You might be right. That said, when someone loses a significant amount of weight they lose it all over. No, his bone structure didn't think change but the thickness of his shoulders, chest, and arms did. That would explain the shoulder issue, and the extra material would could cause the sleeves to hang lower on his arms. Again, you might be right, but I'd like to give him the benefit of the doubt. Sometimes, we can be really harsh to people in the spotlight as if we believe they don't have any feelings.
It is objectively a very poorly fitting suit.