I really think they should not think too big and not have servers to find opponents, avoid the e-sports thing and just do a multiplayer mode that you can play with friends and have fun!
So that way if there is no board to tell who is the best of the best there is no reason to get angry if you lose to a filthy cheater. You can ALT+F4 and deal with it better
So in the end you block/avoid cheaters in your next race, find a lot of decent ppl, schedule a day and time and just have fun in an locked room!
When the game is finished and they get rich they can always update the game for a better online mode or make GRIP 2