I think the Kijimi scene could be kept in if it were altered to just show the city being destroyed. When I considered that option a few months ago, it seemed possible with the shiny new dialogue tools at our disposal.
Showing a Dreadnought Cannon in action would also emphasize the capabilities of this weapon for viewers who don’t make the connection to TLJ or who missed Poe’s line earlier in the edit. Even if that change is clear, illustrating it here makes it more ‘real’.