Yup, exactly. This I suspect is how a starship should turn in a vacuum, inertial dampers in place of course.
Newton's Law regarding inertia states: " An object at rest will tend to stay at rest barring outside influence, and an object in motion will tend to stay in motion barring outside influence." notice there's no part of the law regarding a change of direction of an object already in motion. Granted that changing the Velocity of the object would fight inertia, changing the direction would not.
So, this supports my original statement that banking in a turn in a vacuum (while it may look cooler) is not necessary.