Re: Matt Smith's Departure Confirmed.
Any change in gender, ethnic background should be story driven.
Exactly wrong. IF it happens, it should just happen. Pointing it out as abnormal is exactly the sort of soft racism that critics are highlighting.
Changing gender is a bit different, but we've already established that some Timelords change gender through their lifespan so really all you need is for The Doctor who have a reasonable response to finding himself as a herself.
"There is no reason why good cannot triumph as often as evil. The triumph of anything is a matter of organization. If there are such things as angels, I hope that they are organized along the lines of the Maffia." - Winston Niles Rumfoord.