The premise is: If you want to change your active duty lineup, you need to go through the main DOff UI, which while is not much of an extra effort, would be nice to be able to skip.
f.e. When you are in the STF queue and want to switch out your Astrometrics officer for, let's say, a Shield Distribution officer; when you enter, everybody is right off rushing ahead into things, and you want to make the swap quickly.
I noticed that right-clicking the duty-officer button in the main GUI didn't do anything except produce a weird(?) sound. Couldn't this button, on a right-click, and depending whether you are on a ground or a space map, open the corresponding Active Duty Tab?