You can save at any time in XCOM 2, and you can name your saves. This is, unquestionably, a good thing. I'm not exactly a rampant XCOM save-scummer, but I do save often, and I'm not above reloading an old save if I lose a soldier that I can't bear to lose. Like its predecessor, XCOM 2's saves can get a tad unwieldy after a while, so I have a system worked out to keep things tidy. I rotate through a few saves as I go, overwriting them and re-overwriting them as need be.
I've got one called "In Between Missions", for when I'm in my base. There's "Starting Out", for the start of each new mission. Another, called "Intensity", is for when things are heating up. And then there are a whole bunch of loosely organised saves with names like "Shit Hits The Fan", "ShitShitShitShit", "Oh No" and "Ultimate Failure".
There are a lot more of those latter types of saves than of the orderly, intelligible ones. Come to think of it, I could probably summarise the entirety of this game using only the names of my saved games.