While searching for a root method that wouldn't trip KNOX I ran into KINGROOT. I also read that rooting using this method for the Note 4 meant only a temporary root access, that would cease to work when the phone was rebooted.
This temporary root could work for me as I'm trying to get access to the extSDcard in 4.4.4 (Lollipop didn't work out for me, horrible battery life).
So I was wondering if anyone has tested it... Here is the link to KINGROOT thread