Quick Cast Introduces Input Delay on Key Down - Video Comparison

[angryponystar]

Another quick cast problem I found, Input delay.
I was wondering why quick cast felt sluggish compared to confirm cast or instant cast, and this is the issue: Quick cast introduces a delay even on key down. The video was slowed for clarity.

View attachment Input Delay 2.mp4

 

[angryponystar]

Just for clarity: In the video both keys are pressed at the same time, but with quick cast enabled, the ability comes up after the one with confirm cast mode enabled.

 

[mon05mon005]

Same issue. Might be on purpose? This is most noticeable for targeted abilities like mo ult. The range indicator only shows after a split second after holding the button.