The new timer on orb walking introduced in 6.20 lowers skill ceiling, creates unbalance
The new timer introduced on orb walking in 6.20 makes it so that you have a lot more reliance in getting auto attacks off and not cancelling them. It makes it much easier than before to just kite around someone cancelling continously. The ease of doing this as well as the reliance due to it being a lot safer than before greatly benefits ADC type of champions. They can orb walk and kite melee very effectively right now with the recent change. It's introducing unbalance by buffing marksman up while at the same time lowering overall skill ceiling of the game.
It is a terrible change that I would like to see reverted.