If you wouldn't mind, please list the problems you encountered, and how you were able to fix them.
I've been holding off on my update, just ignoring the nagging for about a week now!
My main problem involved a problem I needed to fix because I spend a lot of time on the road.
I use Hands Free Mode and Voice Control to make and answer phone calls.
It would ask "Answer or Reject" but would not obey the command.
The problem was solved in - Settings > Sound and Notifications > uncheck~ Vibrate when Ringing. (Doesn't make sense to me!)
When using my S Pen I could not get the menu to come up when I pushed the button.
Lollipop update turned off Air Command.
My battery life went fast and charging rate was slow.
I did several Clear Cache in Recovery Mode and over a short period it has straightened out.
I was having trouble with the Proximity Sensor but that has gotten better. It seems to take some time to let the new OS to settle in and to get used to it.
Hope that helps some!
Sent from my Galaxy Note 3 "Size Does Matter!"