Believe me, the old clutch was hydraulic as well. Cars haven't come with cable clutches since at least the early 90's. Having a hydraulic clutch does not mean that the pedal isn't adjustable. Having the pedal lower on a hydraulic clutch simply means that pressing the pedal moves less fluid, which means that the pin which pushes the clutch release fork moves less. If you went too far with that, you'd reach a point where you aren't completely disengaging the clutch.
Chances are that what pokeyl did lowered the clutch, but not enough to be noticeable. This is basic geometry. You're talking about moving the attachment point probably 2.5 mm (assuming the thread pitch is 1 mm), which might move the actual pedal about 5-6 mm. This may not be enough to notice the pedal being lower by setting your foot on it, but would be enough to notice a significant difference in feel through the pedal when operating the clutch.
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