TL;DR
Allow importing goods from other space platform hubs.What?
In the "Import from" selection for requests on space platform hubs allow picking another space platform hub as source for the import. The recent FFF mentioned that the current design allows trading between any 2 surfaces. But for this the request should only work as long as both space platform hubs are in the same system.Why?
Importing from another space platform hub would allow exchanging goods between spaceships without having to send them down to a planetary surface and back up again with an expensive rocket. This would allow a true interplanetary trade network.This would allow trading with Aquilo indirectly. Items would be shipped via Gleba or Fulgora with dedicated ships for each pair of planets and probably stationary platforms for each planet as trading hubs. Doing so via the planet is just too costly and really isn't logical story wise.