I think the outfit is quite a bit more than SW's ep 1 suit, which is still a normal suit, whereas YZ's is more like the dress version. The piano image is definitely apt! And it would fit well at some kind of event you'd dress up for. I bet Ye Zun would love making an impression, even if he gave up on villainy and wasn't being threatening. *g*

it's interesting that he kept his plain white robes in Dixing, isn't it?

Yes! I don't have a good theory as to why, but it's definitely a choice that bears thinking about ...