You can download another launcher like trebuchet.apk and put that into your system apps folder. Make it your default and then delete the touchwiz launcher. I think the real problem is too many system apps from Samsung eating up all your ram. Hopefully, someone will get a list of safe ones to delete. I'll wait for a custom Rom. A custom ICS, with the 1.8GHz OC kernel with smartassV2 governor is way faster and smoother than JB. I have Google Now installed too, so the only benefit of the current JB is the improved notification center.