You just outright eliminated Sweden? Nice. You could maybe have kept him around to vote for World Religion for you, though, if you happened to need a couple more delegates. Not sure how many delegates he'd have anyway.
Random thought, but in that last pic...does that Boarding Party promotion stack if you attack twice? I assume no, but can't hurt to ask.
Anyway, I assume that you have a Diplo Victory fairly clinched (assuming Russia didn't blow ahead in Science or something). Had you had Vassals on this would have been much easier, too easy perhaps, which is I suppose why you disabled it.
I am curious about one of the pics above, where Sweden had 7 Field Guns clustered up. How did you actually break through something like that? I would assume that Rifleman and probably a couple of other units got focus-fired to death.
I think this is a perfect game to show why conquest plays into Diplomacy, even without Vassals. You just killed off all City State competition right there.