MUNDO! If it weren't for my love for Lee, I'd start pwning with Mundo; I've rocked people with him in Dom before, going like 14-1-17 with 19 caps (merely one example). That said, I saw two today in one match, and the enemy Mundo was just as threatening as I imagined - not at all. Still not afraid of 95% of Mundo players.
Skarner, Ahri, and Vayne nerfs? You're welcome, Yorick.
Tryndamere nerfs...don't know what to say. I felt he wasn't that bad anyway if anyone anywhere carried an Ignite or a lot of armor (Thornmail wrecks most Trynds). I fear Kayle more than I fear him, and she prob got a buff somewhere between the Nashor's buff and Surge buff.
Rammus was hardly changed at all. Don't foresee fewer bans. Shaco, however, was hit hard by a 30 second duration reduction. Some of you won't agree, but that's a pretty big deal; he won't be getting nearly as many AFK kills and stalls.
Not afraid of Jax. Yes, without SotD, there's no way to shut off his dodge. But just burst him outside of that CD. I mean he's considerably less tanky from what I've read. Guess he'll annoy Trynd, but Trynd got pwned by balance team anyway. Who cares?
Ninja Tabi...not happy. Dodging 12% of AA is much more frustrating for enemies. 500 damage? No prob - dodge! Now it'll be 450 damage. =\ Still your best armor boots obviously. Just not thinkin' I dig the change, because I've dodged two or more times in a row before. Much more gamechanging.
Riven? Hardly saw her anyway, despite people claiming she was OP. The thing about Riven is every single ability is physical damage. All of them! Yeah, she still hurts, but armor is the ultimate counter. Whereas Lee has E magic damage, Mundo has Q and W magic damage, Yorick has W and E magic damage, so on and so forth. I think those types of champs have an advantage in that they are harder to build against. Straight AD champs rarely scare me, yet some of them took hits this patch. Perhaps the Ninja Tabi nerf will help compensate a bit for their losses.