Guys, I'm not excusing XCOM 2's bugginess, because it really is kinda fucked, but it's worth remembering that Firaxis is a VERY small team, especially for the games they put out. They're arguably the closest thing we've got to a PC-focused AAA publisher right now behind Blizzard, and part of why they can afford to do that is that they keep things pretty tight relative to other studios.
They have nowhere near the staff that studios like EA, Ubisoft, Blizzard, etc do, so patches will probably come a bit slower.
Again, not excusing the game's jankiness and bugs at all, just explaining this is somewhat unsurprising, especially with how Civ V and Beyond Earth were.