[Bug?] Karthus Q and Cassiopea Q are NOT intuitive at all

I don't play too much these champions but I noticed that there **Q** spell are weird to launch. With or without Smart-Cast, they are instant. I play full Smart-Cast with the range/area of the spells displayed. All the skill-shots are launched when the key is released (not when pressed). But not the Karthus **Q** or the Cassiopea **Q**, they are launched when the Q key is pressed. Is it a bug ? Is it by design ? Can we hope any change about this ? **EDIT : **The same applies to Urgot Q too. - *by ** Karmoon***
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