Slight bit of context on yasuo buffs.
Yas mid in diamond + has 45.5% winrate and is the rank 37/39 midlaner, yes he still has a solid pickrate and a high banrate but with a winrate like that he's clearly still having trouble.
From what i can tell w/ this buff they want to reward the good yasuo's who can get a multi-man ult in later game teamfights, which is arguably one of the areas yasuo as a champion struggles since he is squishy and can get blown up easily in the duration of 1 CC.
I think that the yasuo hate bandwagon is over-reacting to this buff, its not a huge buff to his 1v1, as +/- ~150-200 damage on an ability that would only be used once in a 1v1 isnt usually going to be the deciding factor.
It IS however a reasonable buff to his 2v2-5v5 as it rewards hitting more people with ult with a little chunk more damage.
An OVERPOWERED buff, would be increasing the duration of the time his ult keeps you in midair, THAT would be gamebreaking, ~200 extra damage per-target on ult will help Yasuo in teamfights, but will not make him "god tier op"
But as it is
one of the most hated champs in the game, I'm sure the circle jerk will continue.