Any gapcloser that is used in the opposite direction to the enemy should be put on double cd

No.

For what reason should that exist?

I love how some random Riot fanboy will instantly, and always upvote a moderator, no matter what the reason is.

No, but champions should have less mobility in the game. Having 850 dashes in your kit doesn't make you more skilled

No. That would murder many champions who specifically have dashes for kiting. Ezreal, Tristana, Vayne, Lucian just on the ADC side of things. Gnar, urgot, khazix are a few none ADCs that would get screwed