The concept is pretty fun but the only way to get cars higher than C or B class is to win top 2/100 in events. To do that you need to already have good cards for the event so it leads to this positive feedback loop where if you have good cards, you win more good cards, so you win again. Alot of the problems could be solved by limiting the RQ on events. As it stands, RQ doesn't matter after a certain point, and you can just use your best cards every time.