My only real complaint is that the characters were almost indistinguishable from each other; at first, I thought it was another set of clones! I'm sure that if you know the actresses in real life, the differences between them are clear enough, but at first glance they have very similar hair, facial structure, and vocal inflection. I know it's unrealistic to have groupings of individuals represent the whole spectrum of human shapes and colors, but Hollywood studios do that because they've realized that audiences are dumb and it takes a while to learn subtle differences between outwardly similar actors and characters.
Having them seated and not changing their original orientation helped, as did the name tags (though they're small and difficult to pick out from the uniform), but something more should have been done. Different hair styles (and no, mid vs. high ponytail doesn't count), accessories like welding goggles or space glasses (of course they're different from regular non-space glasses! Like the silly Google glasses or Geordi's visor), different uniform details (denoting slightly different jobs), or even having them engaged in significantly different tasks (fixing VHS tapes seemed a little too generic?) could have helped differentiate them more.
Just some thoughts on how actor recognition and character building that can be done through subtle means really helps build a show and an audience.
