As I said before, I think the problem here was coordination between the scriptwriters, the directors, and the design guys was weak on the show.
Look at how earlier Treks treated extras. They were these boring looking people - usually human, though occasionally Vulcan or something else - who were always in the background of the shots. They were rarely referenced by names. Some of them appeared in a ridiculous number of episodes (like Ayala in VOY) yet we never really noticed them.
Contrast this with Discovery. The scriptwriters still treated these characters like extras, only giving them the tiniest bit of dialogue, mostly dealing with system status. But the visual crew decided to give several of them (like Detmer and Ariam) really distinctive looks which catch the eye. And the directors decided to add in "reaction shots" where the camera focuses directly on their face at times when others were talking - signaling they were not really props, but characters in some sense.