I had an idea once for an advanced subspace drive system that would greatly reduce the time for subspace transit. Currently, in order to travel from point A in system 1, to point B in system 2, a ship must: enter local subspace in system 1 from point A, travel through local subspace to the inter-system node to system 2, drop out of subspace, enter the node and activate inter-system subspace drive, travel through the subspace corridor, exit from the node on the side of system 2, enter local subspace in system 2, travel through local subspace to point B, and exit back to normal space. With this advanced drive, you would enter local subspace from point A, travel through local subspace to a point there that corresponds to the jump node to system 2, then go directly from local subspace into the inter-system corridor without having to drop back to normal space first. The same would be true on the far side. If someone managed to acquire that capability, it would allow someone to go anywhere that is connected by inter-system nodes and never exit subspace until they reach their destination. Current military tactics of holding back an enemy advance by blockading jump nodes, would become completely obsolete. Cool eh?
Later!