1. No, the doctor can't change into a different species, only an new Galifreyian body. His regenerations aren't a shape shifting ability.jFr[e said:ak93]...no.
I get it, I get it... The Doctor could technically change gender, but he could also regenerate as a Sontaran or an Ood for that matter. This just seems like gender swapping for press. I may have a different opinion if I was a girl, but why do they have to touch an established property instead of coming up with something else that's good. Orphan Black?
Also, I'm still bitter that Jennie (The Doctor's Daughter... can't remember if her name was Jennie or not) never got a spin off or came back into the series. I really liked her as a character.
This is like making James Bond a girl. Just... doesn't... work...
2. I do agree with your second part. This isn't as much about creativity than SJW and PC going overboard once again. IF a great female actor came along organically, then I have no real issue with this, seeing as it's established a Time Lord can do that (I don't think that ability to should have been added into the canon to begin with, but it is, and it can be worked with)
The companions as as much (if not more so) loved then the Doctors themselves, and saying one has to be the Doctor is kind of a kick in the teeth for every great actress that played a strong companion.
3. Jenny was a wasted opportunity. That would have been the best way to create a female protagonist, with a new, fresh story instead of trying to mix up things for a SJW checklist.