“As long as I agree with you (and loved menubar), this is something that we cannot change just styling GNOME Shell. The three stripes also should be gone when more applications will replace titlebar+menubar with headerbars, that includes menus and button in the same line (see Nautilus).”
I fully take your point that there’s only so much you can change with styling.
IMO apps like Libre Office, GIMP and Inkscape mean that we’re going to have menubars for the foreseeable future. I’ve been playing around in GIMP, and I believe you can at least “de-emphasise” the stripy-ness quite nicely by a) removing the dividing line between the title/menu and b) using the same shade for both.
What do you think of:
…which gives a less cluttered appearance (IMO!) when the window is maximised:
EDIT: I think it has another benefit, too, which is to reduce the visual difference between old-style apps (title + menubar) and the newer style (one header bar). This improves visual consistency, IMO, as shown in the first screenshot.
Also, I had a couple of bits of feedback on non-orange accents. I understand the logic behind using more meaningful colours like red or green. However, I believe this works best when two meaningful colours are contrasted with each other (red versus green). A single green element in an otherwise Ubuntu-coloured screenshot just looks like something you forgot to theme, IMO.
So, if you’re going to use green for “on” toggles, I would consider using red for “off” toggles, so the divergence from Ambiance colours seems logical rather than haphazard:
On the other hand, if you prefer to contrast “colour” with “no colour” for emphasis, then I’d prefer orange highlights. Orange is so ubiquitous in Ubuntu - the login screen, the launcher logo/dots, the Suru software icon, etc. - that I don’t think it carries any negative or destructive connotation here. So, IMO, this is fine too:
The blue on the volume slider is a gorgeous colour, but, IMO, it looks again like something you forgot to theme. I believe orange works as a neutral accent here and is the right choice for Communitheme:
Just some thoughts!