What you are saying, in simpler terms, is that the traction circle in FWD vehicles is limited by the fact that the same contact patch must handle both accelerat

What you are saying, in simpler terms, is that the traction circle in FWD vehicles is limited by the fact that the same contact patch must handle both acceleration and steering. And that's true. This makes FWD setups prone to understeer. Everything you describe services this truth. What's not true is that torque-steer is caused by lots of torque overcoming available traction. The same torque is applied to both wheels in the absence of unequal-length half-shafts. You might induce understeer with the application of torque, but it will not induce a force which changes the steering angle moreso than the same understeer situation would induce on a RWD vehicle, and that's a function of the suspension setup, and mostly dependent on caster angle. Thus I submit that torque-steer is not an inherent flaw of FWD design, but of the most common packaging design in ICE vehicles. It's easy to conflate the two.