Sure, if you cherrypick two features and ignore FaceID, far nicer form factor, larger screen, A12, and a camera that destroys the 6s Plus.Or even my iPhone 6s Plus from 2015. The lack of 3D Touch and lower pixel density make the iPhone Xr a partial downgrade from a three-year-old iPhone...
Let’s talk the features you mentioned:
- 3D Touch is nice to have, but let’s get real, do you use it that much? You do? OK, haptic touch will do the same thing.
- The screen resolution, while perhaps a decent gripe, is still a retina 326ppi display that is likely better in every other way than your 6s Plus. Brighter, better contrast, better color accuracy, and still probably imperceptibly less sharp.