I continue to not enjoy the authored story in any of the modern XCom games.
The weakest aspect of this expansion is the addition of yet more cartoon characters chirping away at me. I do kinda enjoy encountering the Shadow of Mordor - esque boss characters, but certainly not because of the dialogue.
I have two thumbs up for the overall gameplay improvements though. There's just so much new stuff! Loads of new mechanics and features, and loads more variety. It definitely feels more substantial than the original game's expansion.
The Geoscape side of things is holding my interest more, and I feel like I have a lot more viable options as to where to go, what to build, and what to research. This may change as i get more experienced and settle upon a hyper-efficient build order, but for the moment i enjoy weighing my options and deciding where I'll expend my effort.
On the tactical side there's a noticeable increase in the number of abilities that are being thrown around, both from the player and from enemies. It does increase the Power Rangers vibe, but it's fun from a gameplay perspective.
It's also a blast fighting alongside other factions. It's always cool in games when you can use your enemies against each other.
I also love that they've added heaps of character customisation options. All these extra stats (combat intelligence, ability points, bonds etc) serve to increase the uniqueness of each soldier, which makes me care more about keeping them alive.
Overall I'm pretty happy with the state of this game now.