Actually, a shorter brace bow is no more prone to torque than a higher brace bow. The short brace however will magnify any torque or form problems to a greater degree than a longer brace. This is because of the decreased distance between the release point of the arrow and the rest (fulcrum point). The closer the arrows release point from the string gets to the fulcrum, the more form inconsistencies (torque) are shown down range.

Here is an exaggerated example: If I am shooting a 20 inch arrow with a 10 inch brace. When the arrow leaves the string the nock is 10 inches from the rest. If my form has torqued the bow so the nock is now 1 inch to the right, the point of the arrow has also moved one inch, but to the left. Now if I shoot the same arrow out of a 1 inch brace and the nock at the point of release has move one inch to the right – the point of the arrow is now almost facing 90 deg to the left and has moved over 18 inches. The point of impact down range will be much further off.

A greater reflex riser will however inherently be more prone to torque IMO.

So to answer the question (or at least try). Yes I do believe that a drop-away will to some degree lessen the ill effect of a lower brace. To what degree I do not know.