Only thing stopping me from leaving touchwiz to CM11 is the fantastic camera app we have. I love slow motion video, smooth motion and 4k video.
I don't suppose there is any way of getting best of both worlds? - lauchers are just not as smooth as they were on stock (e.g. Nova has tiny but noticeable stuttering when looking at widgets compared to my friend's N5) , so that is not really an option.