I think a real boon for piracy would be a complete rebalance of how ship tank currently works.
Right now in PvP the focus is on amping up your shield as high as it will go to survive encounters, but this means that limpets don't really get to be used. Instead the focus should be shifted to armour tanking with the shield acting more akin to a stamina bar for damage. Usually right now if your shield is broken then it's time to just leave the fight because you're pretty much guaranteed to lose at that point.
A shift toward armour as the main tank of the ship with shield being a secondary, rapidly recharged (Relative to right now anyway) source of tank would mean there is more incentive to hatch breaking rather than just straight up killing the target. Give cargo holds a high resistance to ship weapons but a vulnerability to limpets and there's an incentive to bringing limpets to cash in on the goods.
Maybe shields could still be a primary tank on military ships, but I think transport ships really need to emphasise their bulkiness and be armour plated like gigantic security vans.
Limpets go through shields as of the last patch (2.2)
The problem is - if you do pirate that way, cargo ends up over such vast distances that you can't pick it all up before it decays or fast enough to keep the time/reward ratio even remotely worthwhile.
Also, no punishment system can be added without making crime a worthwhile choice equal to those changes.
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