Lets talk about stacking

As if Yasuo having double crit chance, a shield passive, and a wall that blocks almost any ability in the game wasn't enough League had to have stacking. If you get a team with a Nasus top, Cho'Gath jungle, Veigar mid, Draven adc, and Thresh support, if the game last long enough it will be almost impossible to beat them since all they got to do is farm until they infinitely outscale you. And if you go against this team in ranked then you might as well kiss your promos goodbye because it will tilt you into a 10 foot hole. You could be in lane against a nasus and destroy him and leave to go team fight but if that Nasus is still there at 40 minutes you might as well forfeit because you already know this man is either going to one shot your ad carry or your inhib tower. Or if you have a mid laner who completely fed a veigar who decided to go full tank, even though he hasn't bought a single ap item he is still 1 shotting everyone on the team with his Q. No matter how hard Riot tries to nerf them, well you can't. Unless they put a maximum cap. on their stack then there is no point.