Yes you can root as I have. You have to go back (downgrade) to the earlier version using odin, install towel root to gain root, Then Odin back to N12. You can find the whole procedure in Xda or prob here somewhere. Just make sure to follow the directions exactly! Good Luck
Well when you update its changing just the android version but ni2 stays the same flash a lower version of ni2 then root then flash ni2 again simple just doing the same process just after an update