At quick glance that looked good, do you have one of the newer partitioned Nooks that needs a whole reworking to go eMMC? I luckily had one of the older one from back in march of this year.
And one more thought, to possibly not lose your data, try not formatting data partition and if it boots up properly, run TB to get all your app data. Then reboot into recovery and format data and restore. It may work.