Personally, I am not having trouble with Face ID. I like it and am so happy the home button is GONE. I was over it 2 years ago and hated pushing to do everything. Face ID gets better by you inputting your Passcode, make no mistake it actually is helping your FaceID when you use your Passcode. My personal experience just 15 days in with FaceID is that it feels its getting faster and better. Knowing that its machine learning my facial details, I'm totally ok with entering my passcode. The interface of iOS 11 and the X is just so smooth. Yes I hear some of your complaints but for me its working. Battery life so far seems to have improved for me with 11.2. Love the animojis too.
Yes Santa there’s some really cool cutting edge technology in the X and I’m really liking it.