I love Madame X but wish some/most tracks didn't have autotune.
Not a fan of autotune usually but it can be successfully applied (eg for Rebel Heart's Ghosttown where it became part of the song).
It really takes me out of most of the MX tracks, especially Batuka. It is jarring, adds nothing, and feels lazy beside the stunning backing singers.
Also Killers Who Are Partying makes me cringe but Dark Ballet is perfection (and I'm so happy we got visuals for it).