Vayne & Riven: balance discussion
I'll try to keep it short.
Riven and Vayne have a unique balancing problem that is shared by another champ, the one who's mains should burn in the deepest pits oh the 7th hell and never to come back (jk, 6th hell will do), and if you didn't realise already who that is, it's Shaco.
So why am I saying that these 3 share the same problem?
Because it's not their kits that cause the issues, it's the interactions with items are runes which makes them so hard to balance.
Vayne abuses Rage Blade, Taste of Blood and Ravenous Hunter. Without these she's much more balanced. Her kit as a whole is ok, it's balanced, but her interaction with these 3 things and the early power boost from Press the Attack is just stupid.
But how do you nerf that without killing it for everyone? Those two crowd out a lot of other options as secondaries because of how much power they have. But as a point, you can't nerf Vayne's interactions without nerfing any one who uses them as well.
Same goes for Riven, tho her interactions are with Crapquror, Shlongs of Skyri....I mean Spear of Shojin and Sterak's Gage, with honourable mentions being Death's Dance and Black Cleaver, giving her much more artificial tankiness than she should have, but again, nerfing the interactions for her specifically is impossible and it will nerf everyone who uses them.
So why are they similar to Shaco? That's the other side of the "solution". Nerfing so they are balanced when using those interactions, but that destroys the champion as a whole. Although I hate Shaco with every inch of my body, and I'm a tall lad, he is nothing more than a broken item carrier and I can't help but feel bitty for his mains, as they don't play a champion, they play items (I still think they should burn in hell tho). And because both Riven and Vayne are balanced without the interactions that make them so oppressive, balancing them to be "balanced" with will make them unplayable outside of these interactions, just ask any Shaco main about their champ. And that shouldn't happen to any champ, no matter how loved or hated he is. Balancing like that will only make them weaker, not healthier, that Vayne and Riven build they use now? Will still stay toxic, but instead of being the best build and if you're good you can make others work, it will be the only way to play.
Rage Blade and Spear are already items everyone beside Jax and Yi mains awknoledge as toxic items, and Taste of Blood isn't a healthy either. LeBlanc for example should considering Sudden Impact or even Cheap Shot, but as you saw in the thread made by Riot, the pros playing her take ToB because it's much better, and a lot of the champs take it either as the main rune in that row or preference, and some examples include Ahri, Morgana (for who Cheap Shot should be much better but it isn't), some Zed's, Taliyah, Talon and any laner that specs into Domination either primary or secondary outside of lower elos because all they care about is damage, but holy Aki, the sustain those two give, especially combined is insane.
So that's it, the main reason for why they haven't been nerfed yet is because their problem isn't their own thing, you either destroy both champions or nerf a lot of people, and it's not an easy decision to make, as either will cause a lot of other problems.
Some of you may complain "but Yorik got nerfed foe just a 52% win rate with 9% pick rate", but fail to realise that he went to that in 2 patches from less than 1% play rate with 48% win rate after both direct and indirect buffs.