I personally can't see it, Old FemCow looks more feminine than Old ManCow model sure, but were you to be presented with just that facial model, are you telling me you could identify it as a female? To me, it looks like a cow breed with horns, and the only way I could tell that from a bull was /perhaps/ the horns, but really only by it's udders, or this case, tits. It doesn't have any "female" characteristics in the face to define it as such as far as I'm concerned. You'll have to spell it out for me.
True, Worgen are quite differentiated, but that's because 1: They're werewolves, not anthros. Yeah they are humanized wolves, but they're also really humans that have transformed into wolves, not just anthropomorphic wolves. 2: They have waaaaay more detail in them. Worgen are a Cataclysm race, wheras FemCows have the worst model in terms of sheer graphical fidelity and detail. 3: A lot of people hate this: She's got human-esque eyes stuck on her, she's got eyelashes and I think mascara on, they don't look like they're supposed to be there at all. They look as if they have the eyes from a completely different race compared to male worgen, that is not good race design. No other race has this issue. Hence the continued notion to some people that they should change the female worgen model to be more in line with it's male counterpart. Take a look at this for the comparison.
http://fc01.deviantart.net/fs70/f/20...ox-d3dl2jo.png
The difference between male and female worgen is astoundingly off. The same with the nose and mouth area, you can mansculinize and feminize the genders, but the level of disparity shouldn't be so apparent. Human men and Women have facial differences to be sure, but they're not so radically different that we look like different races. Male and Female worgen look like two quite different breeds of dog.
At the end of the day, I just don't think any of the female animal races need to look "pretty", as in attractive. Because even though they're anthromorphs, they are still supposed to be animal races, and as such, the men and women should look like they belong to the same race, not have the females be "pretty" for...what purpose exactly? You shouldn't find them pretty, because they're cows, they don't and shouldn't fit into what humans find pretty, because they're not human. If people happen to find them pretty that's fine, but Blizzard shouldn't be attempting to make them "attractive". That's what rule 34 is for. The thing is, I even like furry porn from time to time, but that doesn't mean I want my in game models turned into fappable wank bait. Or have eyeshadow with pumped up eyelashes and smouldering eyes. It's the same as I like Women and enjoy porn in real life, but I still think Plate bikinis are stupid.