I’d actually already removed the two instances of the dagger triggering memories of her parents as well as the idea that it was their murder weapon. It is more straightforward now since we need the dagger’s gimmick to be that it will lead to the… other plot device, via the Sith whispers.
And it somehow doesn’t seem right to have Kylo mutter about Chewie at the transport. At the very least it would lack the ability to contrive the sort of beat such a line of dialogue would require in a movie like this.