I had a couple of ideas. Like CeJay I thought the ferengi had planned everything but that her motivation was to exact revenge on Myers for some behaviour or action of his she'd escaped her homeworld to get away from. I like how her motivation was linked to the political tangle of the story but it did seem the wrong way about it.
Other than that I figured she was being set up by one of the others in order to ensure no more feregi in Starfleet or a reason of the like. I might have preferred a resolution like that.
I certainly would have enjoyed it with you had spun the story out a bit more but obviously first time out trying to write a story like this is difficult.
I can see why from a story point of view you wanted the bacteria to have been overlooked but why not have a technician type character who carries out these investigations for the JAG officers such as NCIS have Abbey, Criminal Minds have Garcia, and the different techs in the various CSIs. That way they can reveal the findings rahter than it being overseen and perhaps incompetent of the original crews. It could be a case of JAG want their own tech dealing with the incident evidence and no one else is to touch so it waylays the valid concerns brought up by Admiral2.
Otherwise a great first story of this type. I think you show it could work and has potential. Good luck if you try anymore of this type.