Hi there. Thanks for the feedback!
The amount of turning is dependent of how far you drag the oar in the water. It doesn't matter how fast you do it, or the angle of the oar. The direction of the drag is also a factor in how the turn is applied. If you drag the oar from the back to the front, it will cause a reverse turn.
However the factors you are talking about are definetely something I would like to account for so that rowing can be even more fine tuned and intuitive.