Official team sponsors on helmets
The idea is simple, every team has a certain template of sponsors on their driver's helmets. If I chose my driver to race for Ferrari for example, it would be appropriate to lay over the Ferrari sponsors on my helmet and in the same way, if I choose to race for Red Bull, it would apply the RBR helmet sponsors template on my helmet.
Basically, the same way personal driver numbers apply on official team cars.
I think it would add up to the authenticity of the racing experience, since it would be nice for example to have Ferrari logo and sponsors on my helmet if I race for Ferrari. It could be applied both in Career Mode or Multiplayer races.
It would be great if a dev could provide an insight if such addition has ever been thought of in the dev camp to introduce into the game. Thanks!