Figuring Out Which Button Does what in the Irelia video (theory/thoughts/discussion)
as you can see, the beggining we see the R (usually the most intense, damaging, or useful ability in a kit) this is seems to be it, as it marks and damages all enemies around (maybe a stun too idk) which she can then use Q on, to consume the mark, and reset the Q CD.
Her Q is obvious as you see it during the Riven 1v1, when she turns into a spike and dashes to minions and marked targets, they said they would keep her Q, this is it
W is typically the most defensive into offensive ability (
,
,
, and so many more) so her W is most likely the invincibility that she gets when the blades spin around her (probably cancellable) and when W is not cancelled, it throws blades out either to the nearest enemy champ, or a skillshot
Her E is when she can throw 2 blades out, collapse them together and stun, (her E had a stun on it before, so this one seems obvious) and it marks the enemies hit as well.
This honestly seems like the most logical kit for her, so ima stick with this, leave comments down on what you think :)