The last time Riot tried to buff Yas they were also going to nerf his shield at the same time
His MR Buff and Ult range buff are exactly what Riot tried to do a while ago before worlds, except Yas was also supposed to get his passive shield nerfed early-mid game as well.
Now they are just going to straight up give him both buffs plus a base damage buff to his Q with absolutely no downside and no attempt to make him weaker in top lane at all through his passive shield nerf. Just don't be surprised when Yas ends up becoming really generalist and does equally well against bruisers, ranged, mages, and assassins in both mid and top lane again rito.