I think this was a monumentally stupid idea. The Doctor is an established character, a male of his species. The introduction of spontaneous gender changing with The Master to provide bootlicking to the ever-offended-by-everything-always who think everything should be feminized is a testament to the stupidity of the showrunners.
Doctor Who has had strong women throughout. They even had a female Timelord, the now legendary Romana. The Doctor is/was a role model of sorts for boys. He was never a womanizer, he was respectful, strong, brave, balanced, intelligent, honorable but not infallible. They could have EASILY reintroduced a regenerated Romana to the series then spun her off into her own series. THAT would allow them to boast a real female role model of sorts. The only message those idiots sent by lopping off the Doctor's schlong was that the only good role models are male so let's give him a dress and long hair.