I, like some of the others, am disappointed that they didn't promote her fully to A-Rank. I also understand that if they did, it might look like something shady had happened behind the scenes, and in order to not look like they were giving her preferential treatment to keep her S-Rank boyfriend satisfied, they decided to put her at B-Rank. I appreciated the fact that the examiner made mention of a lot of deliberation going into the decision. That shows that there were people who wanted to put her at the A-Rank that she deserved, and that there were multiple factors that were evaluated. I think the examiner probably would have personally given her A-Rank, but after the discussion, he accepted the reasoning for the decision.
I also agree with Kaido that she shouldn't have let them do anything with her medicine until after they improved her rank (the examiner asking for anything but that seems to show that he doesn't have the final say in her ranking, which is why I think he might have put her at A). One reason for waiting, is the fact that the people that would want to study it would contain several A-Rank Healers. As such, if they are wanting to study such an amazing wonder drug, it acknowledges that her skills are better than theirs. As such, they should only study it after acknowledging her proper rank, and that she is a better Healer than they are.
Finally, though, I'm most disappointed to learn of the blatant disrespect given to Healers in this society. Other adventurers can reach S-Rank, but they are capped at A-Rank? That's outrageous. A proper healer can make a huge difference in a party, and help keep your best heroes alive. She has shown herself capable enough as a Healer to help Gran and other D-Rank adventurers accomplish enough to get themselves ranked as B-Rank and A-Rank heroes, even though they never really developed their skills because they were too reliant on her medicine. If she were another type of adventurer, and was able to drag along a party that low to accomplish tasks that would make them look 2-3 ranks higher than they are, she would be an S-Rank, but because she is a Healer, she gets relegated to a lower cap. They need to appreciate Healers more, and I hope that she becomes the first S-Rank Healer.