My worry was that normal joysticks don't
twist, so not even two of them would do much good. (The additional worry was that aircraft-like motion, easily covered by just a single stick where the throttle could be a thumbwheel or whatever, doesn't work for shuttlecraft. But that's a somewhat different issue.)
OTOH, if a twisting function is to be built in, why not go the full mile and make the movements intuitive? That is, twisting for turns only (pushing forward or left on the pivot counts as twisting, too), and sliding for translations (it's easy to yank a stick laterally fwd/aft or left/right, but a ball is better for up/down yanking). And that could be done with two controllers, or then with just one. Which is why I love the TNG balls, because they look
like they could do it all with one hand.