I was disappointed. I found it difficult to tell which car was which. At least in NASCAR, they have big numbers on the vehicles. We had numbers on the vehicles too in SCCA (back when..). With today's TV technology, I'm really surprised they didn't have a 'balloon' following over each car to indicate the driver/team/race position. As it was, I just watched the vehicles go around the track, with the occasional overtaking action.
Amazing to me was the speed of the tire changes. Two seconds to change 4 tires and have the vehicle rolling again? Some explanation of how they do that (and some slo-mo footage) would seem warranted.
Do those drivers have legs? Where do they put them? There doesn't seem to be enough room forward of the driver's helmet.