I love both these champs. Finally another sexy dude. Rakan sounds more technically challenging, whereas Xayah seems to focus largely on positioning. Xayah doesn't have much mobility, so I think players will have to be really careful with her. She might do well with a Karma imo. Karma can shield and speed her up. I feel like Bladecaller will be both hated and loved because if it's used correctly you can fuck someone up. Rakan seems like he won't be as easy for people who mostly play immobile support champs. Largely because you have to swap from a stay back and kite playstyle to being an assassin to a degree.