Back button will be fixed (in fact it is already fixed in dev build). The firmware for Bluetooth is included, it should work. Have you tried enabling Bluetooth in LE settings? Also can you give me a result of cat /sys/bus/sdio/devices/*/device && cat /sys/bus/sdio/devices/*/vendor if it doesn't work?
I found the Bluetooth option, it was disabled & enabled fine via the config menu. So the back button is my only issue which already stated its been fixed in the next build. Thanks.