The Riven changes will ruin her
Her new passive punishes Riven for playing well by wasting stacks, destroys her ability to fight ranged opponents, and does less damage per auto. This will also decrease her skill cap significantly because she will no longer have to manage her passive, just pretend to be Tryndamere and get muh fury. Animation cancelling, a hallmark of a good Riven, will now be detrimental to her by wasting stacks of her passive.
Riven was great, if these go through and her numbers are changed to keep her viable she will actually be what the community complained about. Faceroll. GG.