I really disagree. With TouchID my phone was unlocked before it even got to my face. With my iPhone X (which I've had since launch) I get lots of false positives. It also means I have to raise it, swipe as I raise it, phone gets in front of my face, small pause, faceid success, phone unlocks and displays home screen. This takes probably 1/4 to 1/5 of a second longer than TouchID where the device is already unlocked and at the home by the time I get it in my field of view.

Personally I would like to see an iPhone X with TouchID under the display WITH FaceID. So if I have gloves on or my finger is wet, no problem, FaceID takes over. If I'm laying in bed and holding my phone to close to my face, no problem, TouchID authenticates. It also means I can unlock my phone without picking it up off my desk with my finger.

You would get the best of both worlds and none of the drawbacks.