Just golded the final "rally challenge" special event (missed the inter one, need to do that), and I have that feeling that rallying is something else that hasn't been fleshed out as much as it should have, apart from the special events, and arcade, there is a woefully low amount of rallying, which is a shame, because its actually pretty good.
I also wish there was a harder AI setting, tinkered with the "one make races" last night, and they would be quite fun, if the AI wasn't so woefully bad, I managed to win my one make CL600 race by a good 10secs, even with a ton of drifting thrown in.
I am constantly finding the physics of cars go from blindingly good, to woefully bad, depending on the car, I think that premium cars are generally better.