It is possible that these were fixed later but... even in screenshots with GNUstep themes i see small glitches here and there. NesedahRik[1], which is based on Etoile's theme, does seem to have the least issues though. But if i was to use such a setup, i'd try my best to fix that icon alignment at the top left corner and add some space between it and the menu text :-P.
[0] http://etoileos.com/uploads/screenshots/etoile-0.4-about-vs-...
Not really. It doesn't look good now, and it didn’t look good then. It's just not good-looking.
For comparison, Leopard/Snow Leopard looked good in 2008, and it looks good now: <https://en.wikipedia.org/wiki/File:Leopard_Desktop.png>
Among the things that I find really surprising in the computing industry is that everyone doesn't make things easy for themselves and agree to just rip off Cocoa.
On the one hand, we hear every time that Electron or the Windows/.NET UI framework discussions come up that developers have no good choices for doing cross-platform UIs. Meanwhile, Cocoa's API is no more or less protected than the ones that Sun/Oracle went to war over. It's also extremely mature. So make it easy and just rip off Cocoa already.
On the other hand, Apple have moved to flat, mobile-like UI. There's hardly a case to be upset, then, if someone were to show up with a lookalike of the old, decrepit Mac OS visual style—something like Aristo <https://www.cappuccino.dev/aristo/>. So make it easy and just rip off Cocoa already.
That's not the rubric the commenter I responded to laid out, but even if you wanted to move the goalposts there, then for comparison, here's a stock Ubuntu desktop installation from 2008: <https://en.wikipedia.org/wiki/File:Ubuntu-desktop-2-804-2008...> Not especially bad, but not especially great, either. Something else that it's not, though, is anywhere near as bad as the Étoilé screenshots that are the subject of discussion.
Also FWIW i explicitly remember a comment from an Etoile developer that their goal with Etoile's style was to avoid the "shiny" look Aqua had at the time (and other desktop themes, like Ubuntu's Human style shown in the screenshot, had copied).
> i'd try my best to fix that icon alignment at the top left corner
I agree there's an alignment issue there, but it's more an issue with the alignment of the menu text than with the icon. The icon looks reasonably centered (vertically) in the menu bar, it's the menu text that's placed too low.
> and add some space between it and the menu text
I believe the icon and the word "Terminal" together make up the first menu item, and thus the tight spacing is intentional, rather than a visual design glitch.