Totally bummed I'm missing it for vacation this year, but really looking forward to the race even so. I think the GT only format is great, but I was never lucky enough to see prototypes at VIR.
FYI to anyone who is into HPDE events we sponsor the Audi Club HPDEs in the region, and they have their end of year at VIR in November. If it's fun to watch it's twice as fun to drive.