I'd play this. It's high-improv in the character side of things, but the nod to Microscope helps with that and I think the questions will offer footholds to the Conversation. (I'd hoped to play before commenting but didn't manage, sorry.)
I'm interested in not giving an actual size for the star map; the distances between the scraps would influence the narrative. A tiny map would force jostling, a big one would allow the structures to be entirely autonomous but allow for conflict at the edges of their spheres of influence, and I think I've just persuaded myself that you're right while typing this!