Sorry - bad news:
Please be warned that the NanoPC-T3 build still cannot be considered final:
Trying to move my DietPi install from SD card to the built-in emmc, one more time, I ran into resize2fs issues, this time with online resizing: 
resize2fs 1.42.12 (29-Aug-2014)
Filesystem at /dev/mmcblk0p2 is mounted on /root; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 1
Performing an on-line resize of /dev/mmcblk0p2 to 1892096 (4k) blocks.
resize2fs: Invalid argument While trying to add group #25
resize2fs exited with status code 1
[ 163.892000] EXT4-fs warning (device mmcblk0p2): reserve_backup_gdb:882: reserved block 128 not at offset 127
[ 164.216000] EXT4-fs warning (device mmcblk0p2): reserve_backup_gdb:882: reserved block 128 not at offset 127
[ 197.584000] EXT4-fs warning (device mmcblk0p2): reserve_backup_gdb:882: reserved block 128 not at offset 127
[ 197.712000] EXT4-fs warning (device mmcblk0p2): reserve_backup_gdb:882: reserved block 128 not at offset 127
I will now try to update the initramfs with the most recent e2fsprogs - hoping that a current 1.43.3 dated Sept, 2016 fixes the issue (1.42.12 is dated Aug, 2014)… 
Will report back shortly about my progress…
awl