Gameplay mechanics are probably already outline at least and should be easy to implement once the game is more complete, they want people to board other peoples ships and such not just blow them up, a real pirate would want to disable your ship board it to steal the ship or the contents and maybe ransom the crew off, there is ships to tow and salvage but stealing the ship whole would make more sense for profit.
If the game launchs and there is a power problem i dont see why they wouldnt implement a PvE only option at least in the safer areas, if you go outside safe space then you can prepare to be attacked.