Ferrari has declared it is going greener (Ho ho) through weight saving and its recent concept showed this with shorter front overhangs and so on through use of composite instead of Aluminium.
A 998 with shorter overhangs and more of the size of the 964/993 a weight nearer 1100kg and even the current power would be the way I would like to see them go especially if they can do some more work on the floor to avoid big spoilers and DI/new materials gives some more efficient use of fuel.
If they did that, with smaller wheels brakes lighter materials like magnesium alloy, composites and alloy with a core still in steel for price - then for me they can regain the ground they have lost against the latest uber-saloons and take the game back to Ferrari et al. The facelift won't do that but the 998 should.
Mind you I still like the current car