@ GDelanghe
As far as I understand, Encore 6 will (?) use something like an Overture core, keeping an Encore-like GUI. The core is something important, but is invisible to the eyes – except for the developer, and bugs.
However, it has been said that the palettes would be replaced by a kind of dock, located at the left side of the screen. And if you look at Overture’s GUI, it resembles very much to a kind of dock, located at the left side of the screen.
Let’s not forget that a GUI is designed at a certain moment in time, designed towards the equipment – the screen, primarily – available at that moment.
This kind of left-side dock, if built around 1990, would either have unreadable characters, or not leave any room for the score. Today it’s quite different, the screens are so large that one needs to fill them (just kidding…)