I don't understand your critique.
My impression of Gitlab is that they've done it exactly right. They copied the good parts from github but not the clutter, and it's looking pretty damn good so far.
Most notably they did not copy the non-hierarchical triple-menubar trainwreck of an UI-disaster (whoever came up with that at github should be fired three times in a row).
Instead Gitlab has a boring, utterly intuitive two-level hierarchical menu, consistently on every page. I love this boring menubar.