The swing is a little different because the pitch is inside. Therefor the hands take off ahead of the body.Pitch location would be what determines adjustments. Done with the hands.. height, speed etc. the body adheres to this. If the pitch is high hands go up. Pitch is slow hands stay back. Pitch is in hands create a tighter line inside the pitch.
It’s not set your body then swing. Too slow. See the hands adjust first then the body?