To echo what others have already said, I've removed blurred rims from almost all cars I've edited for the following reasons:
- It's added complexity, leaving it in means I need to make sure the blurred_objects.ini is correct, make sure all the materials/textures/shaders are set right and then most annoyingly, edit the textures in photoshop to colour them when creating new wheel colours in the CM showroom. Deleting everything to do with them takes 1-2 minutes, making sure everything works with them, probably about 5-10 minutes depending. That may seem trivial but a 3 minute difference when applied to 1,000 cars is 50 hours...
- There's little if any visual benefit, often the transition between blurred/non-blurred state is jarring even at a distance in replays. This is of course subjective.
- Performance gain isn't needed on my setup, in fact it's often better to reduce the object count, sometimes blurred wheels can be 6 or 7 objects per corner.
- The main argument for them seemed to come from photographers and now the CSP photo mode has rendered that argument redundant.
I came to AC from Forza and Gran Turismo, I can say that compared with those games, the AI in AC is fantastic. If you're getting constantly spun out by the AI then you might want to either have a look at your settings or your driving style, you can't be too aggressive with the AI, much like real people you need to leave space for them. I needed a bit of adjustment at first as well, but coupled with Helicorsa, I have better races against the AI in AC than any other racing game I've played, either on or offline (with the exception of one organised league with my car club).
) I don't feel a sudden urge to buy that either... 
but before you do be sure to tell that to every racing game developer. Don't forget Kunos!
