Of course they are, what did you expect?
People are forgetting one of the biggest reasons this game will never be a fully blown SIM and it’s the fact we have so much content.
There’s 830+ cars in Forza Motorsport 7. Let’s say 750 unique ones after duplicates. That means for the stock suspension to not be “attrotious” you have to model 750 unique suspension setups. That’s not going to happen, not when every car has different curb weight, downforce weight, corner weight, weight distribution, steering angle, unsprung weight etc.
Hence why Forza does what’s smart, they throw everything into what’s essentially an algorithm that spits back a tune. It does a decent job for the most part but some cars do slip through the cracks such as rear engined cars. They don’t refine the stock tunes because how can they? The time it’d take to do that for 750+ cars is astronomical. For example, a lot of people complained about Porsche’s lifting up the front wheels and most of them assumed it was the physics themselves. That’s incorrect, it’s down to the stock suspension setup.
People expecting realistic setups for 750+ cars are in a dream world. Why do you think most SIMS have far less of a car count? It’s because it takes far less time to add attention to detail to 100 cars then 750+.
Now, personally, I’d be in favour for a Forza Motorsport 5 style car list purge, where we go to around 200 cars and make them more refined but the majority of the community isn’t going to want that and rightfully so.
Thankfully, this isn’t even a huge problem because upgrades and tuning are a thing and we have some talented tuners out there who can put pretty nice setups on these cars. As for stock hoppers, just stay out of them.
As for cars understeering, most cars in Forza have more front grip and less understeer than real life, hence why you can take most cars to tracks and be much faster than their real life counterparts. A McLaren P1 can do a lap around the ring in the low 30’s, high 20’s.