The armor on her in game looks awesome. But I agree with Yasuchika and Jesot, the skin needs some major work. Her lips have this ugly Mac lipstick clash to everything else, and her hair looks like a helmet.
Riven doesnt wear make up (with the exception of her bunny suit, and even that was more subtle than this) and the way her hair helmets her face looks extremely ugly and unnatural, the bang line should recede as you got further down, not advance. Throw in some stray hairs to give the illusion of depth and layers instead of a complete flat top.
It is the best armor on her yet, but her actual features are just too far below the standard of which the recent models you have been creating. With what riven means to the community along with the event for releasing her skin, I think you can do better.