You’re right. It’s just something that instantly came to my mind as wish for an edit. I thought you could create the illusion Holdo went with the others. Since they left out a ton of command crew from the Force Awakens, it wouldn’t be too big of a disconnect. Unless the next movie constantly mentions her, of course.
Also a great choice! Alas, even more difficult to pull of just in editing. The continuity problems within all the scenes afterwards would be immensely more problematic.