After flashing the rom, you can update twrp.
After flashing the rom, restart twrp, click advanced install recovery ramdisk and flash the twrp file you installed. Then reboot the system and enjoy...
Doesn't it mean anything, my friend, that the name is stable? Weekly roms are beta roms. Even advanced, there are bugs. On the battery side, the stable rom is probably fine.
Dude, new google play system update has been patched with this weekly rom. And there is no new update for that. Are you sure you know what you're downloading?
Edit: