Please give me an option to cast ground targeted skillshots at max range by aiming outside of range.

And by that, I mean let me cast every ground targeted skillshot as if it's a Zigg's Q. If you throw a Ziggs Q past the skills range, it will fire that spell at the maximum possible distance in that direction. Given how that skill bounces, this is an incredibly useful functionality to have and makes his Q significantly easier to land at longer distances. However, other champions could massively benefit from this functionality as well. There are many times that, for example, I want to escape a dangerous situation as quickly as possible using Malphite ult, but the ability will not cast if my cursor is out of range when I press R. Yet Aatrox Q will always go off no matter where you place your mouse despite being a very similar ability, as will Corki W, Trist W, Fiora Q, etc.

However, the biggest beneficiary of such an option would be Syndra. Her Q->E stun combo is absolutely vital to playing her correctly, but is made artifically difficult by the fact that her Q will not cast if you press Q outside of its cast range. That leads to many situations where an attempted Q-E combo will end with Q not going off and your E doing nothing. This restrictive functionality makes Syndra significantly more difficult than she has any reason to be (especially for inexperienced playerds) and gives her one of the steepest difficulty curves in the game which also makes her harder to balance. Have you ever wondered why Syndra still gets nerfs when she has a 47% winrate? Her needlessly difficult kit mechanics is a big reason why.