I'm arguably the biggest fan of Garlemald around as some here would probably attest...and I was pretty happy with how it was handled. We've been getting bits of lore on Garlemald as far back as 1.0 - though I, myself, only began playing as of 2.0 and beyond.

Endwalker brought all the Garlean lore simmering in the background to the forefront. There's also plot threads strongly suggesting that there's going to be more to the Garlean story moving forward.

Overall, I would have liked Endwalker to be the two expansions that it was originally planned as being - but there's no reason to assume that we're done with Ilsabard and there's a lot of nuggets of Garlean lore to be found through leves, item descriptions, side quests and the sight seeing log.

Although nothing has been confirmed as of yet, some manner of content similar to Doman and Ishgardian reconstruction is likely to be available through the rest of Endwalker. Perhaps Island Sanctuary may tie into it, somehow.

I'm rather excited to see more of Jullus, at any rate. He stole the show for me during Endwalker. I'm also eager to learn what became of Nerva, since that seems like something that requires closure. He's mentioned in a couple of side quests and he's been name dropped often enough without showing up that it's likely a tease for what comes in the future.