Originality/subversion alone doesn’t do anything. However, if we’re dealing with a good film that features competent writing, direction and acting, would you think its quality be hurt if you saw the villain wearing white robes and using a blue lightsaber?
Yes however little. It would be a unnecesarily misleading and confusing design choice. Why make the bad guy look so much like the good guys? It’s not even really that original and detracts from the story.
Exactly. In a word, it would be stupid.