The realistic damage mod opens up to more variety and "anything can happen" feel in a race, in a very good way. In the original game, if you don't use a flashback and spin by mistake, it is very difficult to regain positions if you play on a AI difficulty level that makes sense with your skill. But with this mod anything can happen and you can always hope that a crash will happen, deploying a safety car that can let you regain positions and pace.