I really look forward to them doing something about the ridiculous handling of some cars, and the snap that still plagues the good ones. It is known enough and complained about enough that it is a highly visible issue that PD can't ignore. People that play GT for a living, have thousands of hours and A+ driver ratings are still having a hard time making it around tracks in even some GT3 cars, which is just a flat out stupid problem. The Audi Gr3 is an unreignable monster that spins at 140mph under throttle, tries to back itself into every corner and all this is with downforce... something that is so unrealistic it is tarnishing the feelings some have about the physics, which is 100% understandable. If it were a real life car, it would be banned from competition before it killed everyone around it. Same with some other Gr3, and many other various class cars.
The comfort tires, and all tires for that matter, are also ridiculously low grip and behave like old, hard junkyard tires where you can light them up in second with a low power car.
Then there's just the inability to predict and catch a car, then lock into a slide and meter your throttle to manage it. As it is, you have to COMPLETELY drop throttle to catch it and only accelerate when the car is perfectly settled, whereas in real life this division is much easier to deal with.
Still love the game despite the absolute deluge of problems, but I'm still very hopeful that we will see it come back to life when they release some "head out of their ass" updates.