The simple answer is half the content i just don't know enough about to use properly... I'm not a huge formula 1 fan, and I basically know very little about schedules, race distances, rules packages ect. Its very annoying, because I have to spend a couple hours building the schedule in custom season and then reading history to find out if I'm allowed to refuel or not because that information is not readily available. Same could be said for the 60's and 70's touring cars, and pretty much all the Brazilian series. I also have no interest what so ever in modern GT expect for doing stupid stuff. (Multi class oval racing in the rain anyone?) It also doesn't help that almost every car class has the same decotomy. Power vs handling. So the TLDR version of my argument, I just don't know enough to properly use the content we have apart from CART, Group C, Vintage GT, and GT1 which I'm interested in and know things about. Everything else it a complete enigma or GT3/4.