The reflections aren't missing in the 3rd person cam. They just don't reflect the car itself, it was the same in FM4. HeliosT10 (Turn 10 Dev) posted this at neogaf regarding what you see in the mirrors IS actually correct, minus the car reflections.
http://www.neogaf.com/forum/showpost...&postcount=351
As for the game, so so SMOOTH!!!