What would that really offer as an experience to the player after having spent time and resources on creating the feature and having it playable at the same time as the race is being played out for other players. This is a sports/racing title, not an RPG.
I'm genuinely a bit baffled as to what people want this feature for? Who are you going to talk to that would be noteworthy outside of your race engineer or team principle for any essential information that couldn't be done after the race in the usual career mode way? Are you going to ask the pit crew what they had for lunch? I just don't get the value in it.
I would rather the devs spent time giving us ON TRACK features like flat spots, realistic damage, pit lane starts, a more authentic race engineer.