It's just a bad idea Sean. Believe me if you've done any flying you would NOT like a control column that you have to shove sideways, or a twisty yoke, for rudder as well as roll and pitch. Your feet are sitting there doing nothing anyway. And you need to be able to control it one handed so you can work the thrust levers or power levers or throttles with the other. How would you work such a column with one hand?
Plus, in any transport airplane with a yaw damper system you never touch the rudder pedals once airborne unless an engine quits. And if that happens you'll be glad you have your upper thigh muscles to the do the work of holding in rudder input for an extended period, and not your forearms already busy with 2 other jobs.
I'm imagining trying to hold a yoke pushed to the side following an engine failure on rotation, while also controlling pitch and roll with it, while my feet sit on the floor being useless... very unpleasant.
Where it might be viable is with a side stick FBW controller where the stick rotates for yaw, like a computer joystick. But even there, I'd rather have my feet do it.