Xayah and Rakan Should Break Up - Through a Story Arc
You see, with the new duo of champions, game balance will most likely be a nightmare. Either both champions individually will be strong, and together it's an overpowered combination, or together they are strong, and individually are totally nonviable. This would be kind of fun at first, but after a while, no one would want these champions. So I propose an idea - similar to stories that change champions, e.g. Gangplank, there should, in a while, be a story that tells of Xayah and Rakan's breakup, where they would both become individually strong champions that no longer have interactions with one another. It would be a really interesting and cool concept, and you could even make fun emote interactions between the exes. Give it a try!