Skeleton Pets! I'm all about everything related to necromancy and undeath, it's why the Order of Souls remains as favorite faction and narrative element within the Sea of Thieves.
Which brings me back to Skeleton Pets, I'm so happy you added those as it's another sort of Undead theme available for me to play with and to enjoy, like the previous Bonecrusher and Cursed Sails stuffs.
How about a Skeleton Curse? The community is ready for it, for nearly two years now we've sailed around as neon green naked skeletons, and the community embraced it as a feature and source of fun. I think it'd be really cool if us players could embrace the Skeleton Curse and set out with our crews, all looking like skeletons with some slight customization freedom to allow for variety and uniqueness. (Coat, Hat, etc) as selections.
I feel like it could introduce new elements of immersion as players could roleplay as undead and other sailors would have fun getting to fight back or be spooke'd by them!
The community's ready for it? I'm ready for it!
Keep those empty eye sockets peeled...