You can force a power-off by holding the power button for 4 seconds like on a regular PC/laptop and then turn it back on. Cumbersome, I know, but it works. I couldn't find a reset button either.
Onboard BT would be nice, yes but you can connect a tiny USB adaptor which is barely noticeable. You lose an USB port though. I wonder why they didn't integrate a second full USB port, space constraints perhaps?