1. Face ID sensor on the iPad Pro flushed with the bezel, hence it isn't as ugly as the one in the iPhone.
2. Yep, Touch ID wouldn't work with wet fingers. But Face ID wouldn't work with face that doesn't get in line either.
I could unlock with Touch ID while I lift the phone, or getting it out of my pocket. Couldn't do that with Face ID.
There is always trade offs, but Touch ID is the simply a better, and faster biometric.
In my experience Face ID is a lot faster than Touch ID.
Also, a lot of people are saying that you need to get your face aligned well with the phone to unlock, etc. You don't. The beauty of Face ID as compared to Touch ID is that it learns over time. At this point it can recognize me almost all the time even if it IS lying flat on a table. It's almost scary good.
Face ID is just as fast, if not faster than Touch ID, and it's way better at recognizing me than Touch ID ever was.