The main changes:
– lapped cars can unlap themselves during a safety car time. This is so obvious, and I have no idea why it wasn’t done before. This now means that the slow cars can go all the way round and join the back again – meaning that at the re-start, slow cars won’t be in the way of the cars ‘ahead’ of them.
– difficult to police, it says that once cars have moved off the racing line to defend a position, they cannot move back on it. Get ready for more steward-decision inconsistency there then.
– Of course, the exhaust blown diffusers are out, as we knew already, so there is a big re-design for the back / rear exhaust blowing of the cars in 2012.