My vote added to have the option to use the old shake or a slider(but that would make sense). It wasn't perfect but beat the "Sunday drive with the grandparents" way it is now. I understand how it can bother some people and how others just plain don't like it, but for me it helps add to immersiveness and the feeling of speed.
I don't know about anyone else, but when I drive, fast or slow, or when I run(or walk, or crawl, or bike, or ski, or sled or move in any way) I can absolutely see the world moving - near and far - along with every movement or vibration myself or the vehicle experiences. It doesn't look exactly the same(nor in any other game's interpretation either), and my eyes and brain compensate for it just fine, but then they compensate for it just fine in GT5 too even without the help of my inner ear.
But I'm obviously a bit odd since the visible non-1:1 steering wheel doesn't bother me either. I'd most prefer a slider, probably set about 75% of the old way.