They could show Brook Lynn floundering at her job without her being this much of a screw up. Devil Wears Prada was no joke (and not surprising since the author was an assistant to Anna Witour) the job to a CEO of a major business is incredibly hard. While I am all for more characters who are in some sort of health care job, I feel like that not be appropriate for her character. I really think BL needed to be shown working longer at ELQ than a couple days. A month, maybe even a few months would have done it. Really have BL see her dad in full business mode, where he chastises her for what she perceives as completely minor oversights. Heck, since the show loves contrived scenarios, they can come up with a bullshit excuse for Maxie to be at ELQ for something, and have BL and Ned witness Maxie almost effortlessly handle a problem that BL was struggling to take care, because she worked under Kate Howard and carried Nina Reeves at Crimson. That way in a few months, BL and Ned can come to together and realize no matter how hard BL is trying, she is still doing a terrible job and part ways.
However after what Lulu did, at least have it discovered that Spencer tampered with the election machine and have her leak the story to a reporter rival of Lulu's.