1

-What if the Mirror tool would be altered and implemented into a third option (beside horizontal & Vertical)
-This third option would allow the user to set the Vanishing point, exactly as the mirror tool, To a preferred location on or outside the canvas.
-When drawing, the mirrored perspective tool would copy the strokes, adjust them by size and distortion, to fit the perspective set beforehand.

This would be tremendously helpful when drawing buildings, windows, trees, environments in general.
But could also have different uses