Yeah, one of the benefits of procedurals is that you get to see a lot of newer/lesser known actors playing the randos, but it kind of doesn't matter if they don't have anything interesting to do... Also, kind of related to your other complaint about the show, part of why the randos are so memorable is because the death of the week ("A plot") actually ties into the other plotlines in some way, so it's not just hanging out in limbo, it's connected to the continuity of the show and the characters we already care about...