In general it seems like they removed information and made the UI more dense. While the "before" pipeline header did have a lot of wasted space, the "after" makes it harder to visually differentiate things, imo.
Designers aiming to impress their peers over basic UX principles. They all need to go back and (re)read "Don't Make Me Think"
I have copied it into the feedback issue https://gitlab.com/gitlab-org/gitlab/-/issues/414756#note_14... (also linked in the blog post). Feel free to add more details and thoughts. Thanks!