The thing is though, they need to spend their time making something that will be fairly popular. And stay popular - they need a race that people will likely fantasia back and forth to several times. Legit beast races will only feed a small group of people. They know attractive rabbit girls will feed a whole lot more. Taking in the popularity of female Miqo'te and Au Ra, I think it's pretty obvious that Hyur+animal ears will win the race.