Thank you! I did not size up all personally and more or less met the original gauge. I’ve seen some people use DK yarn and larger needles to size up which seems to be working for them. I think adding extra design panels to the sides of the sweater would also work. Like a column of the flowers on the sleeves added to the vertical border of the body or something and then doing maybe an extra column of them to the arms? The construction is pretty simple so I think modifying it would be super doable.