WRT the Garlemald portion of EW: I'm sure that for a lot of FFXIV's history players have been wondering what it would be like to reach Garlemald proper in-game, and daydreaming of epic battles, maybe a sense of "conquering the conquerers"
And it is so, so genius of EW to not give you that.
You don't get any glory or revenge in defeating the evil empire, they already self-destructed on their own. You can't really revel in it. If you're feeling particularly vindictive you might look at the rubble and silently think "Serves you right!" or "Good riddance to bad rubbish." but no matter how much you may have hated the Empire in the past it's hard not to pity what's left.
See, the thing about Garlemald is that in their prejudice and conquest they treated everyone who isn't them as subhuman. But in the end you are all human beings, and so are they. The Empire isn't a nameless, faceless evil, it's a war machine created by the beliefs of humans who saw other humans as inhuman. By helping the survivors you are not only doing the right thing, the human thing to do, you are also disproving their prejudice in the process by reminding them that you're all human. (I'm using the word "human" in abstract sense here, not to refer just to the Hyuran race of FFXIV, but all the races of sentient beings, all deserving of rights, respect, etc.)
I'm trying to shine a light on the significance of this part of the story because it seems like some people have conflicted feelings about helping citizens of a facist former empire, but it would be sheer Reading Comprehension Stat: None to assume that that means FFXIV is condoning their ideology. In fact, it would be antithetical to FFXIV's optimistic, pro-humanity, love-and-peace, a-better-world-is-possible -type philosophy if we instead left the survivors to starve.