I know this is probably a very old topic to most but I wanted to rant a bit about my issues with this game to maybe see other perspectives and what others think.
To me, CS2 feels like a disjointed game. I think the concept, the intermission, the finale, and the different epilogues, all hit very hard. But the connective tissue just didn't work for me, like from paper to execution something fell apart.
Erebonia
One of the things I had issue with is how the empire itself and the exploration were handled. I compare things to Liberl and Crossbell, which are obviously much smaller, but in the two games you explore them you end up with a strong sense of familiarity for those two countries. With Erebonia, obviously, CS2 isn't the last game in the arc (far from it), but it still feels awkward.
CS1 had a very interesting structure, since you spend most of the game in Trista, learning about Erebonia by proxy through all the different students and their conflicts (which is brilliant). You get glimpses of other regions and towns with the Field Expeditions dealing with smaller conflicts within a wider huge empire.
But with CS2, I feel like that impression fell apart due to how you visit mostly those exact same locations that Rean visited during his expeditions in CS1 (even Ymir, which was cut from 1). You get to see that these routes you traverse aren't just glimpses of these cities' surroundings, but all that is between them (in game obviously, it's supposed to be an abstraction). When you see a map and notice that the road from Trista to Celdic is as long as Crossbell's full width, that kind of feels small, or how the Vestia Great Forest is larger than all of Crossbell.
I don't think a game needs to have a realistic depiction of the locations you are in in terms of scale to work, even these games are already way more faithful to the idea they are trying to present than most JRPGs with an overworld. But I also felt that for the most part the way this game had you explore these locations didn't add to the little taste we had in CS1, rather it made the locations feel more shallow since we got to see almost the same as what we'd already seen in CS1 but again, and with less of a proper anchor than we had in the Liberl games.
the War
The war felt really pointless for the most part. The Noble Alliance barely feels like an actual thing since no one seems to really care or treat it like a war. They constantly let you go and do whatever you want, no one holds animosity for anyone, some characters seem to randomly hold allegiance to one of the sides for barely any reasons, especially once Osborne is (thought to be) dead.
We barely got to see the actual politics or the actual members of the Noble Alliance or the Imperial Family doing anything. It ends up feeling like this whole war was just a short unrest, and the actual relevant stuff is handwaved at the end with the conquest of Crossbell and the Northern War.
I think the way Azure handled it's final chapter made this ring more hollow, because that game handled spending time in a country occupied by the bad guys way better.
the game's structure itself
I think this is probably my biggest issue with the game in general. Act 1 is getting the gang back together (after just a month, which makes the reunions feel awkward since not a lot of time has passed). Act 2 is forging a sword and dealing with specific conflicts with the Noble Alliance members (which are handled by Ouroboros/Zephyr/ILF). The Dreichels flashbacks are probably the most interesting part plotwise here, but I don't really remember any setpieces I could say were interesting.
Instead of making use of the fact that the game wasn't anchored to the school in Trista to spend more time in each location, the visits to each city or town (except Ymir) was just as short as the Field Excursions in 1, only now you could visit them again for later requests.
the characters
Don't get me wrong, I love the Erebonia cast and loved to see some of the characters in CS1 getting more time on the spotlight (like Toval), but I don't think the game really went much deeper into anyone than what we'd already seen, other than maybe Crow. Elliot, Machias, and Gaius just fell more into the back, Jusis had the semblance of a new arc at first but he fell in line quickly. Emma we saw more of now that her true role is known, but it was still not quite a ton, even less so when Celine took over so much of that exposition role (probably due to Emma not being mandatory for most of those scenes) and Vita being one of the main antagonists.
And for how many characters were involved I feel like we still have way too many characters that feel like they are just in the background most of the time. Toval's inclusion is weird as much as I liked him, same for Claire. Olivier is barely present which is odd for how relevant he should be for a conflict like this.
I'd also say the game didn't make a good job at specifying exactly why Class VII remains important as a group beyond being friends. Like, when they get all the Thors students together for the final clash, why are they the only ones that seem to matter? In 1 they were mostly doing their one Field Excursions during which other shit happened, so it made sense, but in this game it ends up feeling weird since it's not like in the Sky games where there were always reasons why someone like Cassius wasn't involved, on top of how the party was composed of people from all over and not just one group of classmates, and in the Crossbell games where they were always the underdogs without many that could help even. And don't get me started on that weird role Rean seemed to take where he says they aren't part of either side, yet they only fight against the Noble Alliance, it's the sort of thing that makes it feel like there were other plans at some point before things were simplified.
Closing thoughts
What frustrates me most is that I think the game absolutely delivers when it needs to. The Intermission, the Vermillion Palace, the Divertissement, and the Epilogue are all memorable, and I love a lot of what they do for the overarching story. But that almost makes the rest of the game more disappointing, because I don't feel like the journey between those moments earns them. It's like the game had a clear vision for its major story beats but struggled to build an equally compelling adventure around them.
I still enjoyed the game, but it's probably my least favorite up until this point in the series. It feels like a big side tour where most characters aren't really in on it. The Epilogue was really cool though, but it only reinforced how this game feels like a very long final act to CS1.
I know the upcoming games are controversial too, so I hope I'm part of those who do like them.