I don't know, I've never followed Samsung closely (and still don't).
But look, if Android Police can get rid of their hideous and shit design, so can Samsung, right? Sure, it took them way too long and it looks like a poor rip off the Verge, but it's still miles better than it was before.
Essentially, AP was the Touchwiz of blogs and even they made it. There's no way Samsung is going to drop the ball this time.
E: also, when Samsung started with Touchwiz, it was probably a good idea, because let's not forget how fucking ugly stock Android has been before 4.0.
E2: in other news, Google might fix some annoying shit in 5.1.
"In 5.1 the Wi-Fi and Bluetooth text includes a little arrow pointing down, indicating expandable functionality. Touch the text on an upgraded phone or tablet and you'll open a small list of the closest Wi-Fi networks or Bluetooth devices. This allows you to make or switch connections without leaving your current app. If you need to go to the full settings menu you can tap "more settings," or just hit done when you're, you know, done."