On the one hand, I like the concept. It's badass and awesome. On the other hand, your body proportions are ... a bit hideous. Her breasts look like they're on a completely different, skewed plane from her face, and her torso looks twice as long as it should be. That doesn't help with the positioning of her hips, which are yanked back a bit too far, and come right as her knees should start. She kinda looks like a deformed three-legged centaur. I mean, if you did it on purpose, cool, but it doesn't look it.
She reminds me a bit of Sylvanas Windrunner from WoW. No really in looks but I can't place my finger on what exactly I find similar. Anyway, great job with her (especially with not making her "sexed-up" as you put it) and the rest of the Avengers.
I personally love seeing practical medieval armor that covers and protects your vital organs so you don't die, so even though the upper chest is unprotected (combat situation bad idea), it's still much better than what women are usually delegated, which is stripper gear for battle that makes no sense. Wear it to the after-party, you look great, but during the war, why? Anyway, besides that, it is beautifully done, the fierce weaponry and layers and texture and depth. Really really beautiful and dark. It's amazing. Thank you for drawing this.