Touchwiz has been fine for me for a few years. Have no problem with it.
My iphone, ipad and all computer devices I own lag depending on what I am doing. So I dont buy the lag argument.
So far my Ipad lags the most. iPhone lags once in a while. Note 4 I use it to do a million things at once so it also lags sometimes.
If I dont get lollipop on Note 4 for a while I am still 100% satisfied with my Note 4.
Oh I forget your stuff always different form everyone else's lol.
Nevermind.
But i do have a problem, what enhancements in your opinion the Note 4 needs? Or you are looking for?
LOL you know what sheep means right?