This is a weird patch. Not necessarily bad, but it's got an odd energy, and both stories definitely have bad endings in my book, even though they're different kinds of bad.
MSQ:
That farewell scene at the docks is just fine, but it's really weird that it's the first scene of the patch; not only do I think it lands poorly because it doesn't have the momentum, but it's just weirldy unrelated to everything that happens afterwards.
Speaking of, most of what happens afterwards is extended fanservice to a very specific part of FF9! Not only can you see both Treno's auction house (which is explicitly called out) and the Tetra Master battlehall, but all three of the Mistwake bosses are three of the four enemies you fight in Treno's item shop; the fourth is the Behemoth, who turns up in the solo duty. The first area is also named after Vivi's grandfather. It's all pretty neat, but I'm not the biggest fan of 9, so I just sorta shrug and move on.
Similarly, Doomtrain is of course a summon from 8! Worth saying, though, something I learned recently: it's actually not a take on the Phantom Train! In Japanese it's actually called the Glasya Labolas--which, of course, was way too long to fit into a PS1 UI. Nothing much to say about the fight, it's just neat.
The story itself... I don't think I ever particularly bought Krile's whole crisis, and I don't think we particularly learned anything aside from 'Treno and other towns are still out there'. ...and I guess implicit confirmation that Ninth Au Ra are extinct? Or at least nowhere near Alexandria and Treno. I do think it's neat how heavily this one is tied to a specific Lodestone story, though; Zelenia's story both mentions Treno and introduced Thundran, the person who wound up building Treno's dome.
I also honestly don't think I like what Treno does to the overall story. Something I love about Dawntrail is that while it constantly references IX, it does it at a distance; it's building up IX's world as this abstract, idyllic past that you can't have; it's gone, you have to live with that. ...unless you live in Treno, in which case you can apparently have that no problem!
And then the ending... ugh. Is anybody genuinely happy that it's Halmarut? Or is it just 'hooray, I guessed right'? Everything potentially interesting about her is called into question by the fact that she's an Ascian to me; a green-horned au ra would be interesting... but it could just be a weird Ascian flex, like how Emet looked like Solus Galvus in Shadowbringers because he could. What she said at the end could be interesting... except that because an Ascian said it I don't believe it; there's a big damn asterisk somewhere in her statement, the question is where.
Naturally, Calyx carries the final scene; not because of the plushie design, that's just a pointless gag, but with the fact he has nobody to say goodbye to... because he was never doing this for anyone specific. He's not motivated by some smaller, baser or more selfish thing; he wants to save the entire world, no one person is more special to deserve it.
And the Arcadion:
Individually, all those fights and characters were neat, I liked most of them well enough. The reveal that everything was essentially a show wasn't honeslty a bad one, but I think it was let down by the president just... apparently not being a good writer. C'mon, man, you can't just make EVERYBODY heels! That's not a compelling stable! This is why WCW folded!
The final battle was disappointing, but in a... kinda weird way? The Lindwurm is a perfectly solid boss fight (although I think Hegemone did most of its schtick better), but it's not an Arcadion boss fight. The whole raid series has a strong and unapologetic aesthetic, and the Lindwurm just doesn't fit it at all. It could've worked, I think, if the cutscene afterwards was instead the actual second phase; random giant snake monster isn't a 'pro wrestling' thing, but a Royal Rumble breaking out because a bunch of wrestlers just run into the ring is ABSOLUTELY the vibe.
Part of me is happy that we can finally put the most annoying theory in all of Dawntrail to bed, though. Because we now finally know what the Arcadion's logo is, and we can stop pretending it looks like an Ascian sigil!
It's the Tyrant's combat form. Shoulderpads, horns, mohawk!