The Riven rework actually makes sense
And it may actually solve her problems. She will not be as powerful all the time and she will actually need to use her entire kit to kill people. I mean the only thing she is losing is her passive and it's basically returning but her kit is being focused around her ult instead of her abilities. The only way she can kill you pre-6 now is to weave AAs in and when she hits 6 she trades something for a stronger ult. I feel like this will make her infinitely easier for Riot to balance.
I play Riven sometimes and her current hit isn't broken, but it certainly isn't healthy.