Out of all the things to change in Orianna's lore...
...Riot had to retcon her love of dance.
To be honest, I'm really sad about this... even with the inclusion of her going to the theatre, it seems what she enjoys the most aren't the dancers, but the stories that they weave of the outside world. I think Orianna's new lore is well done within the context of itself, but it makes me really sad that what used to be League's resident ballerina isn't that anymore.