This is a great write up on this. I agree with all of this but have a few thoughts.
My thoughts are I find FaceID better than fingerprint because if my hands are the least bit oily, damp from washing, or dusty the fingerprint sensors don't work for me. Of course I haven't tried the fancy under glass sensors. I've used the side button sensors on Samsung phones,old style iPhones, my iPad and MacBook. I don't even have a fingerprint setup on my iPad anymore because it just doesn't work for me. I realize that's more of a issue specific to me and maybe not other people. The only time Face ID has failed me was in some weird direct sunlight conditions. I think it's the angle of the phone to where the sun is. It's not as fast as fingerprint but that doesn't bother me.
I worry about USB-C being less durable. I find the Lightning port to be very durable to the point it will break the prong off the cable before it damages the port. I had this happen a while back when I had a battery pack plugged into my phone and both were in my pocket. I worry if it was USB-C the port would have gotten damages. It doesn't look as robust with that thin connector in the middle. Also it looks like it's going to be more difficult to clean.
Also that integration is awesome. I miss it when I'm using my Chromebook or Windows PC.