It seems some old ARR NPC's has updated dialogues

[Allegor]

Meanwhile, Slafborn is literally right outside the Rising Stone and his dialogue is still about Papalymo =/

[serus]

Unukalhai has some new dialogue as well.

[Iscah]

For the earlier expansions, you could usually find out any NPCs with updated dialogue by looking through the script for the point where it changed - key moments and final chapters can have a really long list of updated NPCs.

Unfortunately they seem to have done something else with the data for Shadowbringers and (last time I looked, at least) it only had updates for the few characters at the Rising Stones and none listed elsewhere in the world, but things definitely have changed.

For Lambertaint in particular, I think he's been updated a few times now - it got raised in a lore discussion at some point and people wondered if he's being set up to come back into the MSQ. That was a few patches ago, when they didn't have any leads on how to get the Scions home, so I wonder what-if-anything they're planning for him.

Other characters I can remember making comments regarding the current plot are Matoya and (post-ShB if you've completed the Crystal Tower) Rammbroes.

Meanwhile, Slafborn is literally right outside the Rising Stone and his dialogue is still about Papalymo =/

I just have to figure that because of the way time is somewhat "flat" in the game, we're seeing people at different points in time. We're still talking to Slafborn in post-Stormblood time. But yeah, he should have been updated by now.