Absolutely - I would highly recommend at least rooting and flashing kernel like RedPill. It certainly improves battery life, and gives you calibrated screen (seriously, you don't know what the hell you are missing, because Samsung Calibration is horrible), has option to amplify headphone volume, and gives you better sound quality etc. And also many other useful apps need rooted phone.
ARHD is apparently smooth for many people. There are plenty of other ROMs like Project AOSP (AOSP look and feel), X Note (floating multiwindow) etc. Battery life should be awesome too.
Galaxy Note II | Devil Kernel w/ Dualboot | X-Note v3.0 | CarbonROM
Nexus 7 | Paranoid Android 3:15 | Franko Kernel r61