I enjoy playing the Free-Play with multi-class racing but it is highly annoying to have the Formula Drift cars in these events, especially long races. The reason for this is that they appear to have a far greater chance than other divisions to end up being obstacles on the track after a turn. It really sucks to come around a turn and T-bone a formula drift car as it randomly reenters the track. I recently did a 30 lap Road America that had 4 Formula Drift cars in it and the turn 5/6 complex was just a mine field because of them.