Can’t give you a measurement for the increase in turning circle, only seat of the pants estimate. My WB ute still has the long arms on it, I haven’t changed them to short, it’s hopeless in any tight area now. Car parks were not great. The old HX Ute I have with 202 and non power steers way better around the sheds here, but I have never taken it anywhere at speed.
Overall, the WB was better without the power steering. It might be heaps better with the short arms though. Not about to find out anytime soon though, it hasn’t been out of the shed in two years.