I think the problem is that if you were looking for a game that was going to simulate physics to a higher degree than some of those dedicated sims on the market, GT, nor GTS was never going to be that game. It sits at a comfortable level with Forza under those other sims. Not demanding, but also not too easy at times, but accessible to many. The one thing I agree with though, is the helping hand you mention, I haven't played it yet but I've read about it.
After basically
converting to AC, I was still able to enjoy driving in GT6. I was a lot less likely to hot-lap for fun, but everything was there. I described AC as an HD version of GT6 from a physics perspective. Mostly the same, just sharper. It was pretty easy to go back and forth. GT Sport wasn't the same. GTS's reality curve seemed to fall off a cliff as you approached the limit. This meant throwing away some good driving habits to compete in the beta, and then not letting the bad habits stick going back to AC. Again, not something I felt with GT6. I expect that much or better from GTS. We'll see what they do.
My true biggest failed expectation has to do with the cars themselves, which I'll elaborate on below.
As for the different feeling between Wheel and Controller, that's kind of a given. Pad users always get dampening to make the transition from lock to lock easier and not so exact. It's not running on a 1:1 ratio, and that's a good thing I think. If you've tried Forza's Simulation mode, it basically gives you a 1:1 ratio and it does not feel realistic at all. Where as, wheel users have these hidden aids removed.
I'm all for the game interpreting pad inputs, or even interpolating to a degree to help mitigate inherent deficiencies vs. a wheel. That's something GT has always done really well! People were noting that they were having trouble matching their pad times with a wheel. I decided to test this, and sure enough, I was able to match my wheel times with some pretty sloppy pad work. Re-topping that time with the wheel was then quite hard. I became convinced that there were some artificial aids or handicaps at play. Which would be bogus.
When I played GT, I was never good at tuning my own cars, so I can't really say much on that aspect of the game. As for tuning giving people that competitive edge, that makes sense. Why wouldn't it?
Of course tuning is a legit means to gain an edge. But GT is ridiculous. Cars usually get some generic default tune. Fast tunes don't usually look like default. Sometimes a super fast tune is so out there, you wonder how anyone ever figured out that setting it up this way was so fast?!? Talking about accessibility, nothing about this is conducive to that. This first hit me with GT5. Back then I even wondered if I was dealing with hackers.
They were so much faster, all else apparently being equal. That pushed me away from online play until GT6, when quick match with fixed setups became a thing and I was able to do as well as I expected I could. Only after that did I really work to understand GT's tuning. Like you, I mostly just looked up good tunes here. 👍 Contrast all this with AC, where most cars have a pretty optimal stock tune that was clearly honed by the developer. What tuning you're able to do can help tailor a car to your driving style, but you won't find seconds in some suspension tweaks and transmission tricks. You spend more time
driving and a lot less time wondering "is it me, or the car?"
The beauty of GTS's cars really does feel skin deep because of this. How much detail really went into their dynamic design when they all have those same settings? And if they were trying to replicate the real-world character of a car in any way, that was futile, because if you want to be competitive you're going to butcher that character with tuning. They might as well call cars "skins." I get that this sounds like sim-racer pedantry but this kind of detail was always what GT was about. I see no advantage in omitting it aside from saving man-hours on properly researching and configuring each car.
I don't necessarily think they compromised the physics, as this seems to flow with their games in the past. I've read around that things have actually progressed, but they want to keep that accessibility that they've always had, I'm sure.
I like to think what you said here is right, I just hope they're careful and transparent with artificial aids.