(What if there were HS cards recolors?
![Wink ;)](./images/smilies/icon_e_wink.gif)
I wonder if are these the multiple tiny windows that keep bothering you? If so, GIMP 2.8 and higher can keep them docked.
This part of documentation should have yourself introduced to that and to the general interface customization.
![Smile :)](./images/smilies/icon_e_smile.gif)
I guess that there are also addons that make the interface more similar to other applications, but I wouldn't promise anything.
Not what you've expected, I know. But as @Logansfury said, there isn't very much past that to be worried about.