build your own pit crew, so they can earn xp during races so they can level up, just like in a-spec and b-spec. that way the xp and level they get affects how the pit is actually conducted: how fast it goes, how fast they refuel your car, change tires, clean headlamps and windshied, or even make mistakes. also the ability to make performance changes during pit stops (specially during endurance races), like suspension, brakes, aerodynamic setting, etc. dont get me wrong, more cars, more tracks, more premium cars are all good, but the details make the experience all that more awseome in my opinion, guess we'll just have to wait and see.... peace.