This is really great! The art, layout, and writing are all stellar. It's paired nicely with some fantastic advice on running it too.
I do have questions regarding the premise though... If there's 3,000 composites running amok on The Dream, why is it our PCs are just focused on The Harmony Sector? Is the implication "someone had to be assigned to this sector"? Security has done a lot of heavy lifting for us already, if they have the list of names and have already raided this sector, what's stopping them from clearing these composites out themselves? Also, I'm a bit lost on what the layout of the Sector is. Is the entire sector meant to be part of the old Harmony offices with corporate-owned residential suites?
If I were to run this I might disregard the Sector Map and just run it as if each Composite listed is living somewhere in The Dream.
That being said, none of this prevents it from being an absolutely stellar module! I especially love how the layout aids the room descriptions. And I'm really impressed with how much detail you squeezed into the NPC descriptions without making it feel cluttered. Great stuff!