the only thing you can do (and idk if everyone can do it) is to odin flash back to 4.3 (MJ9) and then root from there.
unfortunately that doesnt include a bootloader unlock. but then you can safestrap and install /any/ touchwiz rom
Can you confirm if you've actually been able to successfully do this? If you have, then this would be great news for those who want root, but took the OTA up to 4.4.2.
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Yes, I did this myself on my phone before I switched out the motherboards.
From ND7, you can flash back to MJ9, and then you can root, and then use safestrap to install certain specific ROMs
I will edit this post if i find a link to a tutorial
Damn I downgraded from ND3, not ND7, my apologies.
Here is the Link anyway http://xdaforums.com/showthread.php?t=2752360
I don't have a way to test if there is a way to downgrade.