Diana changes
When getting the reset, two things can go wrong for Diana: missing her Q, or having R interrupted. Cancelling R not only removes all of Diana's damage options, but often just leaves her dead in the water, so we're throwing her a lifejacket (check that metaphor). As long as you target a unit affected by Moonlight, Lunar Rush's cooldown will be refunded even if the dash was cancelled. This change makes it a little easier for those hoping to become the living embodiment of the vengeful moon.
That line's in the tooltip. We wrote that.
ATM, If you have good timing, it's possible to begin dashing to a target who has not yet been debuffed by moonlight and still get a reset.... Moonlight would still have to have landed before you met with the target, but the idea of this practice is to be already flying at the opponent and hopefully timing the dash and predicting that your q was going to land... It has it's own risks, but once you get it down it's easy and it makes you less predictable.
I'm afraid this may no longer be a possibility with the changes..... Won't know until I play with Diana after the patch or somebody can confirm.