Since someone necroed this post (and I got notified of it), might as well type my thoughts
I stopped playing this and uninstalled soon after LEGO expansion dropped. Why?
Because I played FH4 for the immersion, not for the physics, but the jawdropping graphics (with God tier optimization, that allowed maxing the game in triple screen) that make it look like you driving in a real British road network. And the IRL based car selection, with detailed car models.
I didn't like the FFB on rough gravel surfaces, it had way too much "spiking" going on. So, I played the game largely as "immersion/sightseeing/car porn simulator" and stayed on tarmac, so FFB was decent. Physics were arcade, but they had some characteristic of a sim (with simulation mode, all assists off), actually quite decent with just too much grip. It was still immersive.
Once they forced the LEGO cars on the mainland roads....with no way to opt out (basically punishing me for getting Gold Edition) I was done... it started to hamper the first, last and only reason I was even playing. The visual immersion. Which surpassed that of any real sims.
Okay, the LEGO cars among traffic aren't super common and you mostly see real cars, but I already hated the gravel FFB
& having to avoid gravel roads (which already makes some of the game unplayable, because many races/challenges force you on gravel or offroad), and this was the final nail in the coffin.
Wish they would make this franchise slightly more realistic, (in "simulation mode") with a bit less grip and better FFB. And take it into more adult direction, like Test Drive Unlimited 2, where winning races/buying the homes actually had some substance. Seems they are pushing towards totally opposite. This is aimed for kids, or dads playing with kids. I don't have kids, not what I was looking for when buying the game.