[Pandamasque]

I'd keep GTE as a single class but introduce 3 'subclasses' or 'brackets' if you will. Any production based 2-door car with driven real wheels would fall in one of the brackets based on the engine displacement and would be given a minimum weight accordingly. So that the most powerful cars like the 7-litre Corvettes, Vipers and V12 Astons would be the heaviest of the bunch, competing against lighter Ferraris and Porsches with smaller engines, with the likes of Lotus and Ginetta in the less powerful but ultra-light subclass. All of these 3 'subclasses' must be equally competitive for the overall GTE win on a theoretical 'average' circuit. More powerful cars then would be given smaller restrictors for Le Mans. The scoring within GTE should be overall only (except GTE-Pro / Am, but that's another matter).

Example:
GTE-1: N/A over 4.5 litres (or equivalent smaller capacity for a forced induction engine) / 1300kg - for cars that used to be GT1 meterial
GTE-2: N/A 3.0-4.5 litres (or equivalent smaller capacity for a forced induction engine) / 1150kg - pretty much GT2
GTE-3: N/A under 3 litres (or equivalent smaller capacity for a forced induction engine) / 1000kg - Ginettas, Evoras, Caymans, even things like GT86

But this whole thing should be kept for anoraks on forums. The racing should look as if it's all one class.

Oh, and introduce some serious cost-control. Maybe make manufacturers sell customer cars at a capped cost or something. Also get rid of paddle-shift boxes and mandate a simple sequential solution.