I think in rFactor 2 must be possible select the race date, wich now is fixed in .scn track files, you know, month/day/year, with all that implies. Also the posibility to put skins in current driver and helmet, like the cars. My 2 cents.
Right, selecting the date you have the right amount of dark/bright hours, sunrise/sunset of the season, super important, summer, winter, with their respective conditions, dry, humidity, rain seasons, etc.