There is a glitch when i join a playlist with my friends, we wont load into the same playlist and after the race is done. My friend is kicked out of the session. I have to constantly restart the game to reconnect the session and have the playlist work for the both of us.
It would be pleasing to not have to restart the game everytime i would like to race with friends.
Take the risk and add servers. More people will play and spend the money that your company needs.