You can disable that now. Indeed I disable most of its extra needless options and so I have normal looking recents.
Used in conjunction with Action Launcher 3 which now actually supports any icon pack / theme you apply on Touchwiz and the icons will work on its launcher too.
So with the material flat theme installed in Touchwiz, then good.lock installed and set up, along with Action Launcher 3 - you would think I was running a near stock looking device
Oh and tip. HTC's excellent Boost+ which is great at clearing caches and freeing up ram when needed works perfectly on the S7 and other devices too