I would like to ask a Global Menu for Gnome edition. Atleast - optional.
Global menu is important for large content-creative app such as Gimp, Inkscape.
It allows to save some extra screen space, especially for small laptops.
Especially, if it is implemented the way it was implemented in Unity 7 - When window is maximized window buttons (close, minimize) also displayed on top panel. So, not only menubar removed from application, but header also.
You can fit more content on screen.
I don`t see cons here - top bar in Gnome is useless now. It is empty. It just wastes screen space for nothing. Why not to put application menu here?
Budgie desktop did it already (GTK).
KDE Plasma has this feature as well.
Global Menu in Ubuntu Unity was the main reason why I started to use Linux. Shame they did waste it...