Just upgraded my galaxy note n7000 JPLPD 4.0.3 to JPLR8 4.0.4. Bought from UAE. Firmware upgrade done via kids in India. Here are some things I have noticed.
1. popup play for videos
2. Much Better keyboard layout.
3. Icons on menu items. Some menus have changed.
4. Don’t see any change in launcher. I use go launcher anyways.
5. It did not change settings for the launcher or any other app. Did not have to reinstall anything. All data is safe.
6. Don’t see any change in speed.
7. No problems with Bluetooth as stated in some YouTube reviews
8. Battery performance No big change. Hardly notice any change.