Battlefleet Gothic did something similiar to this.
Once torpedoes were launched they moved straight ahead in the Ordnance phase in a straight line, and bypassed shields. Any that failed to damage the ship they hit would continue off the board.
Tau had guided torpedoes that could do a 45 degree turn before they moved.
It was a very cool mechanic. I don't know how well it would translate to X-Wing given the difference in scale. But yeah, still cool.