Been a few days so double posting:

This is untested on the cm12.1 base at least, but it came up thanks to BluesLee finding another bug. Anyone who has issues with apns not sticking after reboot on the latest build, do: devel-su chown -R radio:radio /var/lib/ofono
Then reboot and try setting and rebooting again.

I'm in the middle of sfdroid stuff right now. krnlyng, nh1402, and I have got cm12.1 sfdroid booting and running (well even). Issues so far: no audio. On switching out of sfdroid and going back, the screen is black...tap screen once or twice and it will come back to android. Probably a lot more.