It would be great if you could cheat a bit by locking in a one way trip to friendly planet for a resupply similar to how taking a wormhole can result in a survey ship across the galaxy taking a locked straight path back to your space.
You can already move ships freely between your disconnected island ZOCs. Just click within any friendly ZOC and the ship will go straight there. You're at the mercy of the path generator, tho. You lose fine-grained control over it while it's out of your ZOC, but you can still somewhat tweak its path by clicking around within the destination ZOC (or make gross changes by clicking in any other ZOC).
You cannot click to select a destination hex outside of your ZOCs. That's basically the only restriction on ship movement.
The standard way to exploit this is:
- You find a wonderful system with 4 planets within single starbase effect, at range 41.
- You build a range-45 single constructor, and send it there.
- You build four range-11 colony ships, and send them on the way (to the edge of your ZOC).
- Your single constructor arrives. Construct starbase. Now all 4 planets are in your friendly ZOC.
- Freely order your range-11 colony ships to colonize the planets. They'll jump right over the range gap.
- If (by terrible luck) your colony ship meets a hostile Lost Defender, you can always click within your homeworld ZOC to have it turn around and come straight back.
For your survey ship beyond your ZOC (from wormhole, or auto-surveying an anomaly outside your ZOC), you can order it to return to any hex in your ZOC, from any distance. Or just leave it on auto-survey, and it will happily ignore your ZOC and chase down anomalies anywhere.
I think with the new Rally Point system, you can even set your shipyard to automatically send all constructed ships to a rally point. Every friendly planet is a rally point. So you can auto-send a stream of ships to any friendly planet, regardless of ship range vs. actual distance (because the friendly planet creates a friendly ZOC around it, and so it's a valid destination hex).