As a temporary fix (or maybe permanent), would it be possible to develop a mod that replaces the process of using cargo drones to transfer goods at a station, with a process that simply 'teleports' the goods from the ship to the station and vice versa.
This would eliminate one of the major reasons for the breakdown in trading, and possibly also speed up the entire economy somewhat by eliminating the time taken for the cargo drone transfer.
This doesn't address the other reasons for Trading breaking down, but it would be a start.
