Just finished the main story, which I thought massively improved started from about a third of the way in and became pretty decent by the ending. The entire last level was pretty neat, with a lot of set pieces and some good character building with Jiyan and the previous general (who looks like he could be a ton of fun to play when he's inevitably released as a limited banner). I do think the very last bit when the... mascot character(?) jumped out of your hand and ate an explosion kind of undermined it, though. I don't have a problem with the mascot character itself, but then it's revealed that the final boss basically ran away to fight another day and instantly transitions into an ending slideshow. Super rushed feeling, and unsatisfying in that it gave the player more questions than answers after building up to something of a reveal. I guess we'll learn more as the game goes on, but alas.
I wonder what the next open world area will be. I imagine we'll end up spending a while in Jinzhou and the surrounding area, but they namedropped a couple of places we could go in the future. There's the New Federation or whatever it was called, along with the capital that Jinhsi contacted near the end. I assume those will be saved for big future updates. I'm hoping that Camellya and Jinhsi are coming in the next handful of banners, at least. I wouldn't mind Scar as a playable character, either.