Well, she basically lives and breathes to serve her brother, who she clearly wants to bone. The subservient role is clearly rooted in Japanese gender roles rather than in hierarchical or familial respect. She's "strong" in that she can find well, but that's about it.
Emotionally she was neglected and had rough family issues, but so have a lot of people and she didn't handle those situations in any admirable way (refocused to gain approval from brother through being a physically capable fighter). She isn't very intelligent either,
So she's not "weak" or necessarily "bad" depending on your standpoint, but she doesn't make a strong case for the opposite, either. She's just kinda generic and "there" if you take away her well-designed aesthetics (not talking about sexual appeal, there).
Personally, I find her adherence to stereotypical archetypes to be offensive and regressive, and that has nothing to do with her sex appeal or skimpy outfits.
But hey, to each their own.
I was mostly referring to her DOA3 story. Being forced to kill Genra, the man who took her in as a child when everyone else shunned her. That and she took her crappy experiences and turned them into motivation to become the master of her style.
Her subservience to Hayate is annoying, I agree. But he was nice to her as a child when no one else was (except Kasumi and Genra) and it clearly had a huge impact on her.
Anyway through Ayane's words to the situation of the young girl, Fatal Frame put the focus on what said us DoA Dimensions: Ayane realized that the family bonds are one of the most important things and that can make someone "strong".
The difference is that this time she talk also about the love that come from the family toward the person. I interpreted it as a way to say that there is no really need to look for a respect, Ayane had already it and even more from her real important persons without realizing it.
It will be surely a cliché in the fiction, but again it's a character developmemt that seems to me good for Ayane and that alone is much more of what we saw from DoA2 to DoA4.