About "tuning" in Sport Mode:
1) Let's separate tuning from setups. Tuning is slapping aftermarket parts on, and setup is adjusting your suspension, diffs, ride height, gear ratios, etc... I think the backlash here is against setups being allowed, not tuning.
2) Whether you know how to do setups or not is irrelevant. I personally do not believe it is in the spirit of Gran Turismo to allow setups in Sport Mode. It goes against their philosophy of a semi-realistic accessible racing game. Believe me, I participated for a year in a ACC league and spent 10 to 20 hours a week before each race JUST DOING SETUP WORK! It's like a part-time job and a massive chore. I was enjoying it at first but after a few months it just started to burn me out. I am not a professional driver and don't have a professional engineer. If I wanted to spend hours messing around with setups, well I would just go back to ACC.
3) The obvious solution to this is to mix up the Dailies. For sure there can be races with tuning and setups and races without. That would be a good compromise but at the same time would reduce the variety. Also, if something like Manufacturers Series comes back, I think that would be a great place to allow setups. If you are going to be using the same car for a whole year, well then a few hours getting a base setup together to use and tweak over a whole year sounds OK.
Just my $0.02. For the record, I am against allowing setups in Sport Mode.
Please excuse me for correcting you or questioning your post.
As far as I know, it is possible with ACC to save unlimited setups for the respective vehicle. If that's the case, I'm really surprised that someone says they have to invest countless hours for the setup EVERY week for EVERY race. (At least that's how I understood your post) Well, that may well be the case for you, but then you did NOT use the opportunity to create a proper "library" of setups yourself.
The way I see it, for each car you want to drive, you need a "basic setup" for each route. This is then adapted to the weather and, if necessary, the permitted tires and, in the best case, you also save them.
As a result, you ALWAYS have a working setup for all routes and all preferred vehicles within a "short time". As a result, very long tinkering after the correct settings is superfluous after a short time.
I could be wrong about the setups, since I've only dealt with ACC quite superficially. Because ACC doesn't have a "Nordschleife" and that's why it wasn't interesting for me.
For my part, I hope that if GT7 allows open setups in the daily races, there will be the possibility, as I said before, to save a lot of setups as well.
In a short time you can reach a similar level as now with BoP, only with the difference that the players who have worked out a setup, or who copy a good and suitable setup, will probably be faster than those who drive with the basic settings will.
It's also a fact that the basic setup of a car won't be "undriveable", but it won't reveal the maximum of a car.
On the other hand, there is the "normal" driver like zb. I might also have the opportunity to use the car in your class through a clever setup, which suits you personally better, instead of having to rely on "DAS META AUTO/ The META CAR" in order to be competitive.
I had such a case e.g. at the "Road to GT7" series in Suzuka. The DB1 was THE meta Car and many used it, but also a lot in my class WITHOUT the "meta setup", so these DB1s weren't really that much faster and I was able to keep up very well with my McLaren F1 thanks to clever setup, or even make up a lot of places and achieve nice results.
For those active players here in the forum who don't want to spend hours "working out" a new setup every week, there will definitely be help from other players here who can give you a working setup for your car and the track in question within a few minutes. Then and if, as already mentioned, there is the possibility of being able to save an unlimited number of these setups, I don't see a big problem in open setups.
However, if it stays like it is now, that I think you can only have 7 setups per car, I am also against open tuning.
Of course you can also create a database "externally", but I personally don't feel like doing that. (but would do it if there was no other way)