I don't see why internet fashion companies couldn't take a crack at solving / mitigating at least some of these. For example, there are some sites (like zafu.com - no affiliation) that help women find jeans that fit. They can't change the sizes on the jeans, but I'm not holding my breath for the fashion industry to make sizing any easier any time soon.
I also disagree with her claim that discoverability is not a problem. A lot of people are trying to solve it, but I don't consider it solved for myself (or other women I know). I find the choices in women's fashion to be overwhelming (to say the least), and I'm still looking for the more efficient ways to find clothes I like.
I agree with her overall point that the number of trendy affiliate fashion sites is getting tiresome, but that doesn't mean that they couldn't be developed in interesting ways. It may be true that affiliate sites need to sell a ton more in order to compete with "click-and-mortar" fashion companies, but I'd argue that affiliate sites can also be more innovative, flexible, and forward thinking. If you're not shipping or manufacturing, you can iterate more quickly.