I think the hard decision for PD lies on complexity of tuning and how much are being simulated, than actual driving/racing itself. More in-depth simulation done properly actually makes driving more intuitive, immersive and natural to someone who knows how to drive in reality.
For example, PD could do GT this way : PD can have a car simulated with high fidelity, every aspect is calculated with high accuracy ala PC sims, but the game can preset the values like tire pressure to be optimal, and you don't need to worry about changing it, ever - it's locked/blanked. For hardcore sim player, this can be seen as bad, as it gives the vibe of "arcade" flavor, but for casual this can be a blessing, as most of the player base in GT most likely have no idea how to properly set optimal tire pressure for every given track/car condition. Of course, PD can give option to unlock tire pressure adjustment, this is what I want to see in future GT.
The path PD took with simplified tuning right now I think needs improvement, it's too basic, but then again, more advanced tuning usually leads to alienating the casuals ( by casuals here, I refer to players which usually don't have much knowledge about cars/motorsport/tuning )