You're ignoring the portion directly following that.
[{quoted}](name=A Vitriolic Cat,realm=NA,application-id=3ErqAdtq,discussion-id=nqA4lEna,comment-id=000c0000,timestamp=2015-11-27T07:04:20.284+0000)
Why is it intended? It's really awful to play against when Yasuo throws a W the wrong way and blocks your projectile anyway. I've had multiple Crescendo's miss Yasuo's entire team because of this sort of interaction, and a multitude of other projectiles as well. So I guess the appropriate question then is - who really thought it was okay that Yasuo can splitsecond block anything by mashing his W in any direction?
{quoted}
This sounds as much like an argument against the instant-cast and instant-effect nature of the wall as it is an argument against its size. The wall's gotta spawn somewhere, whether that be behind, in front of, or right on top of Yasuo. Maybe it should only block things from one side, though.
Instant casting and size of the wall have nothing to do with this guy's complaint. This guy is specifically addressing the fact that the wall doesn't have to be aimed.