I don't think so. Perhaps 2020 iPhone. Apple needed 2 years to mature TouchID, I think the same could be said about FaceID.
Disagree. You're Comparing two different types of biometric security as well. Face ID uses different components than touch ID did, which we can only assume that Apple is going to increase hardware components for Face ID, especially given if they plan on expanding this technology into the iPad or other devices in the future.