Maybe I don't understand the question, but this is how I see things -
They don't know if you are autotipping and that should not effect the service. I was just on NCL where they use autotipping and no one there knew that I was going to adjust my tips at the end of the cruise. Why should they, and why should that effect how they treat me. One of the nicest people on the ship was a bartender at the Java Cafe where I rarely went, she did not get her auto 15% (when you purchase a drink) since I was never there but she was always friendly, helpful etc.