I've never been a fan of recruiting the pirate king. Micromanaging his content just isn't worth the extra funds he brings in and the added difficulty of boss fights when one has to send a lieutenant to supervise him. Plus if you let him buy his freedom and have offended him beforehand or manage to cross paths again, he becomes about as much of a pain as if you don't let him buy his freedom. Also I've heard bad things about his romance path, which is why I refuse to do it, despite there being an achievement for it.
Well yes, that's why I dropped him like a hot coal as soon as the King's Navy sidequest came up and let him get captured and hung (earning the Left Him Hanging achievement, because the designers of this game had a sense of humour almost as bad as
@EarthScorpion's). But if you go in with the expectation that you're going to use him for what he's worth and then dump him at the first opportunity to do so that leaves him dead once he starts being a liability, you can get some pretty good use out of him, especially if you go for the Royal Interceptor on the Flagship quest. Which is a bitch to take, I know, but if you
can get it, the loot you rake in from his privateering is
insane. And it also means they automatically hang him as soon as he's caught, so he doesn't bother you later! It's win/win!
Seriously, a lieutenant-heavy playthrough where you recruit as many of them as you can is tricky - managing them all takes practice and juggling them is time-consuming and difficult - but it can be surprisingly rewarding, and some of them synergise really well in ways you wouldn't expect. I doubt you'd
think that Foquet and Eleonore would get on - and in fact they
don't get on - but when they work together you can pull off some
amazing stunts. And also enjoy some amazing dialogue. Lol.