I'm a bit disappointed, to be honest. Arguing for reform comes in all forms, at all levels. It can be targeted at how religion is enacted at state level (there are lots of Saudi feminists), or at the level of how religion is individually lived , for example, through individual acts of re-interpretation, re-positioning or writing texts that argue against misogynistic interpretations, etc.
It's simply not true to bundle all that opposition and critical engagement into 'apostasy' and claim it doesn't happen. That is another form of silencing.
I've given two examples of writers who critically engage, mainly from a feminist point of view. I was hoping that others would add more. I'm not going to take on the responsibility for dissemination. It's outside my subject area for a start. The fact that I, with only a passing interest in this area, can think of lots of examples is an indication that there is a lot of opposition/critical engagement out there.
If you really are interested in adding your weight to women trying to change things, why not donate to something like 'Women Living Under Muslim Laws'?
It's utterly ridiculous to say that there isn't any critique/opposition out there. That's either ignorance (and why would you be posting if you are so ignorant?) or actual wilful misinformation.