Yone's on the weaker side of the roster right now so we think he could use a buff. We know it can feel unfair to simply lose to him right clicking you during his E but we don't want him to be super bursty either, so we're pushing power into his Q, which has more gameplay around predictions and dodging.
Yone won't be much different this year. Considering he doubles how much critical strike chance he gets from each item, he just isn't allowed to crit for full damage.