My biggest issue with Riven is her initial burst damage
I'm still not sure where I stand on Riven at the moment honestly. The nerfs do hurt her some but I still have issues with her somewhat.
She's extremely disruptive for starters, which makes her really hard to do anything against, especially in 1v1s. I don't have much of an issue with this though. She's extremely squishy while her shield is on CD and generally the only form she has of avoiding straight up burst is disrupting her opponent. But the amount of damage she does up front is insane, which makes fighting her pretty lame because you know being low around her is a dying cause because of her execute.
I would honestly like to see changes that would reward her by granting her more ramping damage as she continues to apply damage to you but significantly cut her damage down on her upfront damage. In exchange, you could give her more durability so she doesn't die the moment she jumps on you either.
IDK, I'm always so back and forth on Riven. I just can't honestly say her design isn't bullshit in some manners, even if it still is fairly interesting.