That is the way it should be. Sue is the one running the business side of the FF. Reed is way too absent minded to keep track of things like the daily business side of the FF. Sue is the one investing and managing the money, keeping the Baxter Building and any other properites they own up, and everything else that needs doing.
I don't really need Sue to have some "exciting" job like scientist, archaeologist, or doctor. She is the head of what I'm sure in the marvel U is a fortune 500 company. If they really want to show her growing then show her in a few board meetings for FF Inc or doing some projects to make the city a better place to live. The FF are rich as hell, and I'm sure Sue would be the first one out there using some of that money to help the community.