Please, before commenting here, please wait for the rest of the ideas, plus the main article. It is going to take some time.

Some differences may apply. List here the ones you have in mind.

Initial proposal has to do with Crew Experience, where it has to be lower in Skirmish attacks than in Plunder attacks.
Also, possibly extra rulesets for skirmish for admirals and captains (one rule set for skirmishes and one for plunders)