Those cracks do look quite unsightly on my black paint, don't they??
With respect to sr71bb's comment about the torque limiter cable- I'm not sure I understand how this device would lessen the amount of torsion between the front and rear of the car. Since the cable provides a fixed link between the engine and the subframe under torque, I would think this would actually contribute to the torsion, while the engine mounts act more like springs, which would absorb some of the energy...?
If this were true, I would think welded subframe connectors would be the optimal solution.