Since there has been confirmation from Tidg about progress being made by PD regarding issues and how they have sequenced alterations, let's visit the FFB.
In IRL, tires deform when loaded...and no one really knows the quasi/complex/perplexing nature of rubber as Scaff eluded to earlier. But, I do know they flex when driven spiritedly, and when they do, the forces travel back -- hopefully in a communicative way -- through the steering column and other bits if you are paying attention. So just to be clear, this is typically the level of deformation a road tire has to endure. It's a sever range, and the forces exerted are not linear...the are parabolic...Pls skip ahead if you've seen this.
So if traction/adhesion levels vary dramatically, why is the FFB is GT7 (and most sims) feel one dimensional and need of a severe rethink. As someone stated prior, there is a weird 'rubber band effect' happening and it isn't bad, but it also isn't dynamic either. Before you jump to criticize, I understand the limitations of calculus -- especially on a console. I still enjoy the somewhat communicative nature of my belt-driven TGT...We are just having a bit of a laugh as we enjoy our digital tinker toys.
So here's my exhibit A. An Alfa on the most famous track that we hope will never perish. If you look closely and ascertain how this person is able to sustain being on the limit, you will likely conclude that the FEEDBACK he is getting from multiple senses are informing his judgements. To deconstruct this a bit further -- the wheel goes heavier as he approaches the limit on entry. The chassis flexes as the front left/right bears most of the load and he can feel the G forces in his body as the weight transfers to the front axle. The tires also sing in unison to confirm. Once the limit is crossed due to driver error, things go light and rotation happens in a subtle slip, giving way to a slide that feels like air going out of a balloon. This is just a simple assessment on corner entry...same principles apply on mid and exit, with LSD playing a crucial role. Watch this vid for the 'wiggles,' this for me is what is missing, this little dance, on and off, then back on again, over and over as tires degrade...
In my view, the addictive drama -- brought by the amalgamation of these sensory inputs that drivers feed off of to find pace -- is currently missing in sims. To be fair, I know this is a tall order...but the snap/physics/modeling in GT7 are not the only issues. The FFB that is transmitted is equally important, and arguable for the enthusiasts -- the most important...no matter what the physics.
To PD,...to you who have pursued this for a few decades now, find your North Star and get on it. Current misgivings are just shameful...you are leaving the door wide open for a pass...and competition is coming, don't you doubt that!