Riven's Going To Be Broken Next Patch
Calling it now. With the mana nerfs, her low-cooldown, mobility, 100% offensive item builds will turn her into the most oppressive top laner since Lulu showed her face up there. Being able to reset her animations was what separated good Rivens from great Rivens, but now that they're actually letting EVERYONE do it, AND make it happen faster, I don't think any other melee champions will be able to stand up to her anymore.
So yeah, I'm going to start banning her next patch. Don't know about the rest of you, but I don't see how any mana-using melee champions will be able to hold their own against her. Hell, I don't think very many ranged champions will be able to hold their own for very long either.