I don’t think it’s necessary to remove Hux sardonically asking if he should destroy the city. A Star Destroyer is a powerful vessel, and it’s not like they were in a Final Order Destroyer at that point anyway.

And about the line “every one we knock out is a world saved.” First, it’d be very awkward to try to remove since the main SW theme is blaring. But I think it still makes sense, not as a numerical ratio. Those Destroyers with their big guns are gonna go fuck up “all free worlds.” Taking them down in total saves the totality of all worlds. So, to put it poetically, each one destroyed could be said to save a world.