Agree as well. For the purpose of adding difficulty to level-bombing a CV, variable speed could possibly be an advantage to CV evasive manuvers. I find it too easy to level-bomb a CV from 8K unless a fighter defense is hanging over it. The CV speed and turning ability is too predictable, and usually my load of bombs sink it.
EDIT: Latrobe, you are one of the very few, then. Very seldom has someone proved they are that good at the helm.