I just researched online a bit about how the LaFerrari works and its different driving modes.
People seem to not know exactly how the car works.
Here's the deal:
The car has about 5 driving modes, 3 of which are relevant: Race mode, TC off mode and ESC off mode (most extreme, basically drift mode, its even advertised by Ferrari as such).
The car generally sits in Race mode (even in GTS if you check the steering wheel, its like that.)
In race race, ESC (ASM as its called in GTS) is on and TC is on on a lower level (somewhere between 1 and 2 in GTS).
If you set ASM on and TC on either 1 or 2, AND equip the car with sport soft tires (which are the equivalent of the stickiest road legal tires, such as the ones LaFerrari comes with), you won't have ANY issues pushi g the car hard and managing to keep in on the track.
As most people set their ASM off (because it's not selectable by car in GTS, and it kills maneuverability in race cars), you re basically driving the car in "drift mode" and hence its very hard to drive.
Also, regarding its acceleration in GTS. If you srt the tc to 1, floor it, let go of the breaks, it will do 100kph in about 4.5 secs. In reality it does the veryy low 3s, BUT only in launch mode. As there os no launch mode in GTS, its its to replicate.
FYI, launch mode in LaFerrari works as follows (taken over from a drivetribe article): ASM is automatically set to off, TC is automatically adjusted on the fly by the car. You slam the break and the acceleration after activating it and let go of the break. The car automatically revs to about 3000 rpm before launching, and automatically shifts into 2nd before torque begins to fall, all the while automatically adjusting the slip and TC of the car.
This is obviously impossible manually, and non reproductible without launch mode on (in reality or GTS). So as long as GTS (and AC for that matter) dont have a launch control mode for the car, don't expect that kind of acceleration. Its not how the car works.