Oddly, his costuming! Recently I've been drawing a lot of Arthur for his comics and realised most of his outfits don't make for comfortable wears in casual scenarios so if I had more free time I'd like to properly sit down and figure out how a guy like him would move around- also do a proper breakdown of his outfits and see if there are any elements I could strip for casual clothing. I know I can always just draw him in the looser and casual outfits that xiv does has but I don't particularly like any of them for him so I'll have to come up with my own stuff haha