I bought the Ferrari Enzo and took it for a drive at Nurburging GP circuit and I also notice the stopping distance was terrible.
I dont think the brakes are the culprit, it is the tire modeling in GTS, ver 1.10 now.
The grip falls apart so suddenly in this game. Biggest problem is the lack of feel in any tire deformation, sidewall flex, and incorrect modelling of slip angle traction. During heaving braking or when the cars begin to slip and get yaw angle, the traction falls off too fast, and this is the effect felt in heavy braking that is happening with the Enzo. At Nurburging the very first corner, the hairpin, i over shot that many times when I first got in the Enzo. I had to learn to think of braking way earlier than what I would of guessed.
Just for comparisons I turned on Project Cars 2 and Driveclub which both have the Ferrari Enzo. The car is these two games is so much more enjoyable to drive than in GTS. I cant believe I spent 1million credits for it in GTS and it drives like crap. I can enjoy driving numerous laps with it in PC2 around the same Nurburging GP circuit but in GTS it feels like work trying to drive it. With practice I can adapt to it in GTS, but its not fun to drive.