Navigation is another thing we are focusing on for the next several months (https://about.gitlab.com/handbook/ux/strategy/). In the next release, we are simplifying it (https://gitlab.com/gitlab-org/gitlab-ce/issues/26200). We plan to continue to improve upon our navigation and information architecture.
If you are curious, you can follow along some conversations that are happening here: https://gitlab.com/gitlab-org/gitlab-ce/issues/27557.