Yup, it's possible to change the variator point by altering that map in the firmware, flea should be able to do that I would think.
The grande punto system is implemented by oil pressure, found this description:
The phase transformer actuator comprises a rotor in one piece with the camshaft that can rotate in relation to the pulley (stator) moved by the crankshaft. The rotor is equipped with vanes and moves through the effect of the engine oil pressure on the vanes.
There are two compartments (the advance compartment and the delay compartment) created at the two sides of each of these vanes: the oil can flow into one compartment or the other.
The pressure of the oil entering a compartment pushes the vane to one side and the oil in the other compartment is discharged to the cylinder head. The rotor and consequently the camshaft are thereby rotated in a certain direction (advance or delay).
If the engine oil alternatively enters one compartment and the other continuously for the same time, the pressures at the two sides of the rotor are dynamically balanced and it remains still.
The flow of engine oil is activated by a cassette solenoid valve which places the oil ducts in the cylinder head in contact with the advance or delay compartments.
So they're using oil pressure on both sides to balance it, which neatly gets around the problem of oil pressure increasing with engine revs, whereas in the coupe you'd just have the variable oil pressure pushing against the return spring... sounds unlikely it would be accurate enough.