I've done this plex? a few times now..and not seen anything in the first room. And proceed straight to the 2nd room via the jumpgate.
With the latest build, the first room no longer holds any npc ships and you can use the gate without getting the key/pass from the container in the hollow asteroid. The drop from the overseer has seemed to be lowered as a result of making this easier; I've had only tech1 modules along with the overseer's pocessions drop with metal scraps as the salvage. Once in a while, you get a nice "old style" drop.
Hey Peeps! I just ran this site 08/05/2010 and the Overseer dropped 4 significant Modules 1) Corellum C-Type 10mn Microwarpdrive, 2) Corellum C-Type medium Armor Repairer, 3) Corellum C-Type Energized Adaptive Nano Membrane, and 4) Corellum C-Type Energized Reflective Membrane! Just thought I would post a more Rescent Drop experience in this Exploration Site. Incidently I found the Sig in a .4 Lo-Sec System. It would appear that the Site has not been Nerfed as many have Suggested. Fly Angry…..
-Cyber
done this a few times, drop varys between nothing, shadow serp gear, coreli a-type, corelum c-type, and got vigilant bpc from it twice