First TC - only reason cars use brakes instead of cutting power is due to having multiple wheels. See if your in a RWD car and the right rear wheel breaks loose it could cut power but the left wheel still has traction so a better option is to apply the right wheel's brake.If the system is designed to detect "wheel spin" and it does not include application of a breaking system it IS NOT by definition: Traction Control. Look at every modern car (track or not) and it uses braking force to bring the car back into line. When you "retard" ignition you are simply cutting power. SO- TC is not on this bike (or any other for that matter). Suzuki's system uses a similar concept as Kawi.
As for the compactness of current sportbikes: Today's bikes are far smaller than their ancestors. A 1995 CBR600F bike was 405 dry but the dimensions of the bike were about the same as a 2004 or so CBR1000rr.
In short- they make them for jockeys. As long as you're between 145-175 you're in the house, but bust the 195 mark and things get tight (not in a good way).
In motorcycle racing I believe none of the TC systems use the brakes, and there's no need you can slow the rear wheel down with the engine.
Bikes getting smaller - I don't fully agree I ride a 1986 GSXR-750 regularly and have also ridden a 2002 GSXR-750 and a 2007 GSXR-750.
The 1986 GSXR is the smallest peg to seat (bends your knees the most)
The 1986 GSXR is much narrower than the 2002 GSXR, and even a bit more narrow than the 2007 GSXR. However the 1986 had the highest bars, most upright position (thought they had been raised 2") The 2002 has the farthest reach to the bars, the 2007 is actually more comfortable than the 2002, at least bar reach wise.
Seems to me the part that makes bikes hard to fit on is the peg to seat ratio which the 1986 was the worst for. The bar reach just determines how tucked over you are. While the width is just sort of a preference thing.