I'm not sure how viable it is for Wreckfest 2 engine but having the option to Rewind (similar to Dirt & Forza franchise) in Single Player would be nice.
Of course, having it enabled or using it should reduce the overall reward from the event. But for long races, it might be a nice trade off from winning & lose the race on the line or avoiding a serious crash part ways through. This feature would be disable in Multiplayer, Tournaments & void leaderboard post for fastest lap times.