I would really love to see some elements of X-Com Apocalypse in *some game* out there. Xenonauts 2 seems like a good target. Specifically, I'm referring to a deep strategic simulation. For example:
Aside from having multiple countries to satisfy, different companies could be located around the world, and so could different factions, which could have relationships with each other.
The companies could be ones from which you buy your gear at affordable levels, and if their factories get destroyed, prices would go up.
If you piss off certain companies, they won't sell to you at all.
The companies could also be taken over by aliens.
Basically, take what Apocalypse did with one city, and apply it to the globe to make a more interesting simulation.
Since it seems like a lot of effort is going into just making the tactical combat good, it might even be worthwhile to make this into a DLC. But somebody needs to do this, and Phoenix Point doesn't quite cut it IMO.