I'm still not sure that the problem is real or at least worth the fuss. It might be, but I'm not convinced. It might be more like the name effect, for example: real, but tiny. The first step before trying to do something about the issue should be to make sure the issue isn't illusory.

So far, I see Alicorn complaining about her aesthetic preferences not met by the prose on the forum, but how typical is it? Some people agree that the writing decisions made by some of the posters are not that great, but how much of it is support of hypothetical preferences of other people isn't clear. A whole information cascade about preferences may form this way, with hardly any of the participants benefiting, but most of them thinking that they help others. A few can't demand of a community what they intuitively think is fair.

Everything that involves arguing that it's important to not drive women away from the site is contingent on the reality of effect of writing style choices on the number of female participants.