Yasuo windwall should have a limit to how many abilities it can block.
No reason a well timed wall should block 3 ults, 50 autos, and 20 abilities. Makes no sense.
EVEN IN THE CINEMATIC yasuos wall was up for about .5 second and blocked one Volley of arrows.
Edit: I am putting ward the idea of yasuos wall working how it does in the cinematic. Where he hits the button, the wall appears RIGHT IN FRONT of his character model, and moves forward, growing in size. When it hits its max distance, it goes away. This allows a well time wall to block a ton of abilities if used with skill, yet doesnt put an entire team out of the fight while they wait for the wall to go away.