F1 seems to make a few rule changes each year, but nothing quite a drastic as those proposed in NASCAR. Being such a high-tech sport, many of the changes relate to aerodynamics, car design, engine longevity etc. Others are introduced to improve safety. Some do prove to be controversial, such as the DRS (drag reduction system) which helps cars overtake.
Liberty Media have made a few changes since they took over, and I'm still not used to races starting at 10 minutes past the hour instead of on the hour. They're also looking at new tracks, which I hope won't be at the expense of some of the great historic ones.
There's is, however, one major change for next year - it'll be the first time that none of the races will be shown live on free-to-air TV in the UK. Only time will tell if this turns out to be a bad idea or a terrible one!