Well in my case, I myself have changed everything, I have removed the knox, debloated, I made the tweaks, etc.. and in the end I removed the root. I do the wipes and factory reset and ready, is perfect no trash.
if I want to make something in the future, back to rooting.
I think the phone works the same with or without root, but it is preferable to avoid problems without root.
Actually once you have made the settings do not need to root, it is assumed that we had to have root to eliminate waste at & t.
unhappy with root? clear!, we can not unlock the bootloader, we are not satisfied by the root. LOL
By the way how many signatures are on the petition of at & t to unlock the bootloader of course.
Phones: Charm "sold" / Defy "sold" / Atrix 2 AT&T Stock "Rooted" / Galaxy S5 SM-G900A Stock "Rooted" / Nexus 7 (2013)