[gpvecchi]

What do you mean it's wrong? That's exactly how it works.
Your post in the other thread is not correct, the slave cylinder is fully extended (that doesn't mean on the bumpstop) when pedal is fully depressed, it's not longer and limited by the clutch extension (this would need a bypass for oil, or the pedal would not fully depress).
Simply, clutch needs some extension to disengage (8 mm for stock Exedy clutch), but the plate can be pressed more. Moving the slave cylinder position simply presses it more changing the engaging point of the pedal.
Numbers in example: if the slave cylinder has 15 mm excursion, and 5 are used to correct play, I'll have 10 mm of excursion left. If I move it 2 mm (I remove 2 mm of play), I'll have 13 mm of excusion left.
In every cases, the excursion will not be limited by the clutch.