Board Thread:Game Discussion/@comment-24.163.59.111-20151223181619/@comment-26249703-20151223222445

the off/off portion (referring to brake assists and TC) means you can accelerate earlier than with those two assists on. This is quicker as long as you don't accelerate earlier than the car can handle.

As for steering, it's personal preference. I don't like the car going where I'm not telling it to, especially when I'm trying to cut corners ;) but I guess it can help with not going off-track and nullifying your lap.