It would be nice to have more button options for example: stay on top of all windows stay behind all windows a spaceer would be nice so people could add a custom space between close and other buttons PS: Also a killer feature would be to display menubars inside the windeco like it is possible on kwin now with a button: https://www.kde.org/announcements/plasma-5.12/global-menus-window-bar.png or like the old KDE mockup: https://www.opendesktop.org/p/1167272/
Adding (even) more buttons to the title bar on the WM decorations is something that was asked before but denied (a search in bugzilla would show a few dupes), I think 6 buttons is already too much and I'd rather keep the title bar lean and mean (other desktop like GNOME even default to a single “close” button). As for adding the application menu bas inside the title bar, gtk+ has a different approach, it uses client side decorations so that the client is fully in control of what to show in its title bar. The KDE aversion for client side decoration (so much that they even try to enforce SSD on Wayland) is something I do not understand and certainly not something I would copy, Xfce is based on gtk+ and as such adheres to gtk+ approach of preferring client side decorations. I understand you may not agree and prefer KDE approach, but then KDE is probably a better desktop for you.
>The KDE aversion for client side decoration (so much that they even try to enforce SSD on Wayland) is something I do not understand and certainly not something I would copy, Xfce is based on gtk+ and as such adheres to gtk+ approach of preferring client side decorations. I guess they just do what they ever did: Let the users decide how they will use their PC's. Also I don't see any reason why Wayland means that windows can not have a traditional titlebar. Mate and Cinnamon have proved that its is possible to retain a common titlebar>menubar>toolbar even on GTK3. >I understand you may not agree and prefer KDE approach, but then KDE is probably a better desktop for you. Also I never needed that feature in KDE because in every KDE app you could always hide all menubars, toolbars or statusbars with the same simple keyboard shortcuts. Not really see why you come to this conclusion. I have used Xfce since the introduced Plasma and I regret nothing. I'm just a bit scared by some recent Xfce app releases eg: CSDs in catfish, system monitor that dont follow my xfwm style or missing menuicons in parole that make it hard to navigate through the menubar.