In the games I’ve played so far, I’ve found myself in several situations where I needed a certain number of additional ships at a star, but was out of position to transport them in time.
For these situations, it would be great if there were some feature allowing a player to “Rush order” a certain number of ships at a star, with them arriving at the very beginning of the next game tick.
I see it working like this: a player notices an incoming attack which would capture the star too late to send a carrier to reinforce it. They instead pay (20 / X) rounded up per ship, where X is their manufacturing level, and purchase a maximum number of 5 times the industry at that star. Those ships arrive the next tick, before combat begins, allowing that player to maintain control of the star at the expense of a decent sum of money.