OTOH the demographics that are going against the GOP over time are four years worse for them in 2016 than 2012. And other issues that are going against them over time, like gay marriage, are four years worse too. The GOP is going to have to change eventually if they want to start winning national elections again.
As far as your other bit about women not liking Hillary, the link below shows how Democrat and Republican POTUS candidates do with women over time. I think it's a safe bet that Hillary will do at least almost as good, if not better, then other recent Democrat candidates
http://www.gallup.com/poll/158588/gender-gap-2012-vote-largest-gallup-history.aspx
Appealing primarily to the white, male, heterosexual Chrisitan demographic is going to be a worse and worse strategy as time goes on.