Yeee, I'm going to take a break from ranked Riven until this is all patched up in the future patches. Dropped from 62 % to 53 % over time since this patch hit.
Knowing Riot, your chances of it being patched and fixed are slim. I hate the nerf as much as you do, but I grew into it. Granted, you're also not matched with and against a higher rate of total idiots, so it's worth almost nothing to me, but it still isn't a problem you should be worrying about. Mess with more exotic builds a bit.