Interesting ten. Not very fast, and cannons are not so accurate. However, the boarding bonus is very nice. This would pair nicely with a Gold-Capture crew or Captain Nemo, who could then feed his captives to Havana Black. Furthermore, this is Pirate. The Pirates have TONS of great crew, with wold hates, SAT/EA and other nice options. It would be very easy to tun this into a boarding focused dreadnought. Her one problem is her speed. S isn’t going to catch anything and a max speed of S+S won’t catch much either. However I think that a speed of S is a good thing, otherwise this could get very powerful very quickly.
Small quibble with the flavor text. If the crew of the Revolt revolted, then I don’t think they would consider themselves slaves still. So instead of ‘slaves’ maybe ‘former slaves’. Just a suggestion.