I all the calculated interactions that you guys add

I know you like add advanced mechics for higher elo players that can use. Its cool how riot implements high elo cancels to widen the skill gap to widen higher elo players for lower elo players. I wonder its intentional for you guys to have added cancels like yasuos air blade or do you intentionally implement it from the start. Or maybe do you guy make some small uncalculated error and players begin to practice it and you guys like to so you turn it in to an actual cancel like rivens 3rd. Cuz brna had already been using to jump 3rd walls and then a couple patches later you added to rivens kit as a known cancel and made the code to it more friendly?