This is an 'online racing simulator', you want it to be as realistic as possible so smashed glass, wheels that come off, broken lights, when you run on the grass pieces of mud and grass come on the track, animated pit crew doing the jobs, when you crash and you can't drive anymore (because your engine is destroyed (also one of the ideas)) marshalls come on the track and look at your car, would be awesome and very realistic to a proper race
If any of this does happen though some of it would probarbly be no earlier than S3.