Wouldn't it be better then to tie it in with some form of Star Gate/Wormhole/Jump Gate/Space Tunnel thingy then?
I mean, if ships have to sit there for a while anyway, which by the way makes it sounds vaguely familiar to former jump-like sci-fi methodes used in other worlds/stories/games ect

, then I'd rather have it being more restricted instead of letting ships jump.
How about being able to construct huge warp gates of sorts in space using the constructors or even a new module, (The gates are sorta used in the background lore), between two points in the galaxy, obviously within a finite range and not from one end of the huge map to the other.
Gates that allows ships to travel through them but like Asteroids they would limit traveling speed for a short while after the ship is clear of the Jump Gate. You could even force the ship to spend 1 turn on the gate/in front of the gate before being allowed to jump through, and then not allow it to move during the turn it travels through the gate, ie. it jumps and appears at the end of the Jump Gate, but then remains there for the reminder of the turn.
You could tie in the new tech research line for power plants. (Fusion, Anti-Matter, Quantum) Each step allowing longer distances between gates.