I tried installing OTA update, the tablet turned off during update preparation. And then it would boot up only in fastboot. As it came out, recovery partition was resized, and TWRP that was there no longer fits and no longer boots. So, I had to boot TWRP via fastboot boot. When TWRP booted up it started flashing the update. Everything seems to be good now, except that I no longer have a recovery on this device, so further OTA updates won't also work and would require manual TWRP booting.
And BTW, are there any plans about NFC working?