If you read Juraj's latest column on the Xray website, these are likely to be the few upgrade parts available, with the possibility of the "double driveshafts" as well.
At the TC Euros in Spain, the team had practiced with a slightly altered version of the car. However, I think only one driver used this updated version at the race itself as the others prefered the standard car. The updated car had the motor moved forwards towards the centre of the car and ability to run the 38t (EU) front and rear pulleys with the 20t (US) centre pulleys. Nothing crazy and nothing to justify a new car, so don't panic!!!