I seem to recall that Riot has said numerous times, that they want their game to be consistent. Meaning that stuff that works for one champ should work for other champs, that stuff should make sense.
Why is it then, that Yasuos Wall often can block attacks, whose animation already hit? Where other defensive spells would often be considered too late and the damage taken, the windwall blocks. It seems to be very forgiving with what normally should be too low reaction time. Especially for a champ that has its high advantage in fast pace and just shredding the enemy with speed and mobility, this should not be rewarded. If youre not gonna predict or react good enough, windwall should not block