Comics Alliance's Juliet Kahn wrote an article called
"Smart, Nice and Sassy: Good Girl Role Models Make Boring Heroes" and I thought it was a pretty interesting read that make some great points about a lot (though not all) of the popular female heroes that have been popping up over the last few years, especially those coming from Marvel and DC.
Maybe when we start seeing more female writers hired for these types of titles, we'll end up with more female characters with real flaws and deeper complexities? I wouldn't be surprised if some male writers are reluctant to do this out of fear of backlash from the community, if certain aspects transfer to the page incorrectly or are misinterpreted by fans (or are problematic all-together, if well-intentioned).