I love this! Honestly it makes soooo much sense to have Warlocks in Dungeon World and the way this has been constructed is SO good (also, there's so much!). I really like Curse as a main mechanic not only for the many options you give but also how easy it would be to implement homebrew ones to suit the style of a particular patron.
My favourite moves are: The Devil's Own (classic warlock move I think), transmogrify (holy shit!), and mark of service (because come on, aesthetics). Thank you so much !!