i would say that the real important thing that happens that arc is that Mon Mothma, somewhat accidentally, pulls rank hard on shit-au-Vader in a way that makes it clear in his mind that she is the one 'holding his leash'

because you can't write darth vader unless you admit that he has a massive chip on his shoulder labeled CLASS ISSUES and - wait no where are you all going wait come back QUICK HERE'S ANOTHER COMMISSION THIS TIME BY JAKFACE CW FOR EYE CONTACT,