I know that doing FDR is the preferred thing to do, and results in the best and cleanest possible condition for the phone.
but, it takes me days to get everything back like it is now.... there is NO WAY to preserve all of the data, nor keep all of the unique settings setup like we like our apps to run, once you have done FDR.
So, I just decided, that since this Note 4 was behaving pretty good, I would just leave it alone.
My only issues with it, are to do with Bluetooth. it is a sometimes thing as to whether it works correctly or not. and voice calls, the audio gets lost at times, and I track it down to something being activated which switched the audio path while the screen is locked.
IF I unlock the screen before I turn on Bluetooth headsets, they seem to perform more reliably.