OEMs are beginning to take note of all the custom mods of the Android mod community. Both HTC and Samsung have included theme managers in their latest flagship devices. The Note 5 also has an included theme engine. My favorite theme so far has to be the Material design theme. While your phone will still be very much running touchwiz you will have the color scheme and icons of Stock Android. The Material theme looks better than touchwiz no doubt. To acquire the theme you will need to set up a samsung account, head to settings, then themes, go to the theme store, you will find it under "Most Popular". It used to be free but is now $1.39. I think the small fee is worth it personally.