Praiano, I know what you're saying about the powerful cars. I never raced anything under 400 hp and racing softs for the first four months I had the game...lol. What? Race a FWD car with 275hp on Sports Softs? Never!!! Then I joined a Cappuccino racing league on Sports Softs and I was hooked. The challenge with the slower cars on the harder tires is precision and momentum. There isn't enough power to make up for mistakes so you have to be smooth and precise and generally the drivers are closer together which is fun.
The type of cars I'm talking about are things like the Mitsubishi FTO GP Version R, the Vauxhall VX220 Turbo, Mazda Atenza 23Z, Toyota MR2 GTS, any of the small Elises etc. All around 450-500pp on sports softs.
I did use your award winning Integra tune and have won every time I have used it, it's lightning fast, but had to modify it for racing because the tail was a bit too loose for me to be consistent. You had to really be on your toes with that one, but boy was it fast!! Same with the Mitsubishi Tarmac, I used a combination of your and my tune tune last night in a 450pp sport soft Mitsubishi only night and won twice with it and finished second the three times I used it. It struggles a bit on the straight but corners like a demon to make up for it, and you can push it real hard and it's very forgiving. A very underrated car for sure.
If this isn't your thing, tuning the slower cars on harder tires, that's cool, no problem. It's a whole different challenge and not for everyone.