The COT ran at Talladega in early October and the resulting race was hardly a ringing endorsement of the car, despite some excellent racing overall. This was supposed to be the big proving ground of success with the COT and it wasn't. Which isn't surprising as the car has consistently failed at literally every goal assigned to it.
For Talladega, one goal was to eliminate expensive restrictor plate intake manifolds; the opposite is happening as teams build new such manifolds, making nonsense of the car's advertised cost reductions in that area.
And with ratings and attendence continuing to slip, the sport's COT gamble is proving a bad one. What NASCAR does now remains a mystery given the seeming lack of idea how to handle failure like this that permeates the sanctioning body.