MSQ
I think they did a good job balancing the fact that we can cure Tempering now with the reality that it requires a ton of aether to do so and can't be done en masse. It's... pretty obvious that they'll never realistically be able to unTemper everyone (especially individuals they have no access to), but that they can unTemper people at all is a very good thing. Especially when there's a lot of towers that have popped up world-wide that seem to do exactly that...
What I will be curious to see is what will happen with tribes like the Vanu Vanu and the Ananta where the bulk of the tribe doesn't like summoning (or getting Tempered) and the faction doing the summoning of Primals is a minority that was doing so when they weren't Tempered (at least to start out with). There doesn't seem to be anything stopping people from still summoning Primals and getting Tempered all over again if they really want to... and there are cases where a small minority of people just want to cause problems for no good reason. Vanu Vanu in particular comes to mind as an example where a small sub-set of the tribe didn't like that other tribes had a good relationship with Ishgard and purposely summoned Bismark to wreck that relationship while not being Tempered...
Watching the Ironworks figure out how to unTemper people with the equivalent of machine learning was funny to watch. And I really want ice crystals in real life for my PC! It's nice to see the Scions get some breathing space and a solid win in the Source before all the nonsense will start up next patch.
On boy. Frandaniel. I am reminded of why I can never put FF9 on the very top of my list of FF games. And it's because of Kudja... who Frandaniel sounds more and more like the longer he talks. To the point I'm thinking the reason FF9 isn't more annoying is because it has no voice-acting. Because I cannot see myself sitting through an entire game of a villian like Frandaniel and... I very much remember Kudja saying many lines that are exactly like his. At least in content if not in theatrics.
I feel like Frandaniel is a constant reminder that... the Ascians are not good people. They like causing chaos. And there nothing quite so chaotic as destroying the world. Also, I really doubt the Ascians would want to clue in anyone who was a good person to their power set. What if they used that power set for the other side (which is one of the reasons we are so annoying for the Ascians to deal with)? So there's probably a lot more people in the ranks of the Ascians who want to cause chaos than actually care about what state the world is in. And the two Ascians that cared the most about the state of the world just got axed. No one is riding herd on the other Ascians so we get this. Go figure.
Zenos is... being Zenos... apparently he's going on a quest to get a better weapon? I really hope he bites off more than he can chew somewhere along the line since that would make him more interesting...
The new towers are... a concern. To put it lightly. For one thing, they've popped up everywhere and not just Eorzea. For another... they're apparently Tempering people... to be loyal to Garlemald? Maybe we'll finally get our Garlean primal? Regardless, the idea of a bunch of towers all over three continents putting out aether and seemingly having something to do with the Final Days being recreated isn't good. Given that the dragon is "Lunar Bahamut" specifically... I'm uncomfortably reminded of the Lunar Cry in FF8 and how it's more or less a beacon to the moon to let it know it's time to dump monsters onto the Planet. Only we know what's in our moon and it's nothing as benign as a bunch of mindless monsters... The idea that Zodiark to have something to do with this is very freaky. Another thought is how in FF4... there's Lunar versions of all the summons... so... maybe that could be it too.
All in all, good breather story patch of getting some much-needed research done before the chaos really starts up again in 5.5.
Eden
As someone who played a lot of FF8, this was a really fun raid tier. The music was great. Seeing references to Time Compression, Draw/Sock/Cast, and Junctioning was really awesome (and a bit groan-inducing).
Mitron and Logrif make for really good foils of Fandaniel. Sure they are Ascians, but it's pretty obvious they didn't want to keep the world around just because the Unsundered Ascians were telling them too. They genuinely want to keep at least their world around and stay alive in it, particularly with each other. I definetly was getting Squall/Rinoa-type vibes from them. It's also nice to get confirmation that yes, the Ascians that get killed are going to get reborn same as everyone else does. Hopefully without Zdoiark's influence. And without their past lives' influence now that we let all the Convocation Memory Stones dissipate into the aether. Now if we can just keep the world around for them to get reborn into...
Eden being a Sin Eater version of Mitron checks out given how monstrous Hades' true form is. Thinking about how much aether an Ascian has access too and it all getting stagnated all at once... yeah, I can buy it just fine. Also explains all the funky Creation Magic Eden has that the other Lightwardens lack.
Gaia being an Ascian that isn't Tempered by Zodiark. Woof. And this is why I can see the Unsundered being so adamant about giving people the memories of their lives in Amarot back and probably getting Zoidark to Temper them. The last thing any of them would want is someone with Gaia's skill-set working against them.
Werlet
If nothing else... Emet-Selch totally succeeded at utterly trashing Garlemald's sense of morality. And any hope it has of surviving whatever's coming next intact.
This does go back to one thing I keep waiting to get explained... and that is where the heck Gaius managed to somehow get as much a sense of honor as he has. And his general lack of racisim compared to... most other high-ranking Garleans we meet. To top that off... he almost comes across like he is legitimately shocked at how bad the rest of Garlemald has gotten. It almost feels like he was so busy doing his actual job in the provinces, he wasn't back in Garlemald to see how low the people back home well falling. Gaius is also one of the very few characters who... kinda just springs up out of nowhere still. The furthest back thing we know about him was that he was the second-in-command of the XIth Legion before being made the Legatus of the XIVth Legion. And that's... pretty much it. How he got to that rank in the first place? We've got nothing. I do think Gaius has just about had it with the current Garlean situation though.
I didn't think we'd see Allie get split off from her brothers this soon though. It... opens up some options for the ending. Which is going to be screwy no matter who it is. Zenos' data coming into contact with the WoL is... probably not going to go the way anyone thinks it will.
Role Quest Epilogue
Having Unakalhai and Cylva spearhead the effort to see if the Void is salvageable feels right. It always felt... odd... that the Scions on the Source might be working on that when... they really have no tie to the Void and the Source has plenty of problems of it's own. But with Novradant saved and the Empty being brought back to life, it feels right for a Shard that same so close to Flooding would want to help it's sister shard that did Flood recover. Or at least, see if it's feasible.
Personally, I can't see the Void be actually fixed sometime in the game's lifetime, as the Voidsent make for too good enemies to be summoned (and it might also cause weird timeline issues too). But I could see the promise of it being "someday" fixed in the far future. Even Novradant waited a century after the Almost Flood to be fixed... so it's reasonable that the Void would take even longer to fixed as the Flood of Darkness did fully happen.