Idea for diana kit modification/update

Basically you know how diana's q leaves a medium sized "circle" after it has been cast (image shows what i mean)? I thought it would make her kit more interactive or at the very least more interesting if it did the following using the image linked as an example:

Passive addition or change: Diana can use 'Lunar Rush' to areas marked with 'Mark of the Moon' to reset the cooldown. (Maybe this part is too much,) If Diana uses Lunar Rush on an area with 'Mark of the Moon' on it, the cool down is refunded (like how it works when it hits a champ) but will remove Moonlight from enemies previously afflicted.

Q change: .Diana swings her blade to unleash a bolt of lunar energy that deals damage in an arc before exploding and leaving the 'Mark of the Moon' (name subject to change) where the spell stops . Afflicts enemies struck with the Moonlight debuff, revealing them if they are not stealthed for X seconds.

'Mark of the Moon's' size is the same as the "explosion" left by her Q, Crescent Strike. obviously there would have to be some kit balancing but what do you guys think? It could add some pretty interesting mobility to her kit. Just not sure how riot would trim the power that it would give from the rest of her kit to balance it out.