In seven months' time we'll know if the American Le Mans Series' class system shake-up was a stroke of genius that brought big grids and great racing back to a faded championship, or a piece of knee-jerk tinkering that confused fans and alienated teams.

This time last year, a spectacular Sebring 12 Hours preceded a low-key season that turned into a rather flat two-horse race between two Acuras, thanks to Audi and Porsche pulling out and the adoption of full ACO rules preventing the LMP2 cars from threatening the LMP1s.