I have a SS linkage on the turbo and I love it even though I do not track the car.
However, I would like to stress it has been a welcome addition due to the use of a lightened flywheel and lighter rods that make revs fall far more quickly between each gearchange than on a standard engine, hence the need to reduce the time needed to change gears.
On the S2 the engine is mostly fully standard and I do not think the driving experience would benefit from any quicker gearchanges.
If I reduced the time needed to change gears there, then I might have to wait a bit more before re engaging the clutch until revs fall to the "right" level. For sure it may only be a matter of personal adjustment to the car, but in this very case not worth it in my opinion.