This sentiment (bolded) is popping up a lot in this thread. I can see it either way: for some people it's an upgrade, for others it's a downgrade. For me, personally, I consider X -> XR to be a clear upgrade, thanks to the camera/Smart HDR, processor, and battery life. Yes, the screen is certainly a downgrade, but as long as it's good enough (which seems to be the case with the XR) this just isn't particularly important to me.
Now, if the XR's LCD looked like utter crap, I wouldn't care about its other features. But from all accounts, and from my own personal experience, the LCD is fine. Better than fine.
Even so, if I was really interested in picture quality/screen tech/resolution, then I'd probably consider the XR to be a downgrade from the X. Apparently that's how a lot of people feel. Neither opinion is wrong.