It might be a bit closer to her science goals than nurse was. Perhaps Korby's disappearance and death ruined archaeology for her? That can happen to some people. Some people join careers with a lot of travelling because they don't like to stay in one place, a way of running from their pain and problems.
I think that genetic research is her goal. She's very invested in publishing papers and she's on load from Stanford so she's a researcher. Archaeological medicine seemed to be a side interest that evolved from wanting techniques when technology failed. They haven't really shown us what archaeological medicine is as the digs we've seen are pure archaeology and this doesn't seem to be a longstanding career goal. The choice to maker her a doctor likely seemed to be modern and feminist at the time but the SNW Chapel and TOS Season 1 Chapel seem to love research and scientific advancement rather than the actual practice of medicine. Personally I think that archaeological medicine was a side interest that faded rather than ruined because of Korby. She does seem to be someone who throw herself into new adventures and travelling due to a bit of pain and PTSD.
Yeah, not like IMDb is a vast improvement, but I'm much more likely to pay attention to their ratings than RT's. RT is the People's Choice Awards to IMDb's Emmys.
I have no idea how ratings and sentiment are tracked. The reviewers have delivered much more notably negative reviews of this season and acknowledgements that the quality of the season was 'mixed' have been made by the showrunners. I assume therefore that the season did not fair very well on whatever metrics they / Paramount use. Seasons 1 and 2 were well received but this season has received a lot of criticism. I know others disagree but the reviews really do point the finger at too much melodrama and romance especially for Spock. They need to return to Season 1 and 2 quality if they want a shot at Year One. Paramount are not handing out easy money anymore.