Very interesting topic. One I thank SHM for bringing up. His idea is simple and not game breaking by any means.
I am not sure about added extra skirmish points as a reward when we already have a tech that can be researched for that. That part seems like double dipping.
Zero turns for skirmish is also a bit much. Turns are a commodity in this game. Maybe make it 1 turn.
I do agree there needs to be some extra perks introduced for pirates and pirate held ports. There are several forum topics regarding this subject.
I will also say I agree with 99% of what Vane has said. His arguments are just. I am not a pirate but know what it takes to be one. It is tough, way tougher then any other play style in the game. ''Tis why I am a hybrid player.
My honest feeling on this subject is Flagship and some tweaks to a pirate held port would be enough incentive for a pirate in my mind that all other ideas could be tossed out.