Patch 5.20 general discussion
http://www.surrenderat20.net/2015/10/520-patch-notes.html
I think the Fiora nerf is a pretty big deal as most players would drop it on an enemy that is about to die in team fights and only get 1-2 Vitals before it went off. I like this change as Fiora is supposed to be "the Grand Duelist" and not "the Grand Healer". It's power is more or less unchanged in her 1v1 duels while getting around it's cheesy mechanics in a team fight.
Eve's nerf...... why?
Darius' nerfs are fair and alleviate some of his oppression sticking power to pretty much every Melee match up in lane. His heal is going to be a lot harder to pull off in team fights as well.
Mundo buffs are far from a solution to his problems, but I'm glad to see them making an effort to help a more or less forgotten top laner. I don't think these changes are going to do too much because Mundo's biggest problem is that almost the entire current Top Lane Meta counters him
The Teemo buffs that people were asking for went through. No opinion on this really
Tiny nerf to Vayne's early game. To be honest I'm glad they didn't go too crazy with the upcoming Marksmen update being a complete unknown of how it will shift the ADC meta.