I would like to suggest Magnets into the game.
The way they would work, is that they could stick to parts of other ships, or even repell them.
It needs power, and could have a range of 3 blocks, perhaps longer, and can be turned on or off.
The way it could be used is to stick to the side of an enemy ship, and slowly drill into them using Ion beams, or other weapons, without being moved if the enemy tries to fly away, since you literally stick to them, until they destroy the magnet, or if you turn it off.
The Magnet, as I mentioned before, could also repell ships, wich can be used as small ship launchers, on a bigger ship. It would greatly support kamikaze ships, since they would be really fast for a short amount if time, depending on the power of the magnet, or amount of them.
Perhaps the Magnets could have different sizes, or simply a 1x1 one, wich can be expended upon placing more.