The current safest way to use CFW while maintaining online functionality on OFW is to create an emunand and use CFW on there. Just boot into your usual nand to play online.
Yo i accidentally updated from 7.0.1 to 8.0 too. I had a rawnand backup from OFW 7.0.1 but not a boot0/1 backup? is the boot0/1 needed for a downgrade? Or is it better to wait for atmosphere to support since i have an unpatched console?