Over center spring with hydraulic clutch bearing?

Here's my question, if you have gone with a hydraulic clutch, why would you want to leave an overcenter spring in? Why did you go hydraulic in the first place?
There is no magic in "hydraulic". With given diameter of slave/ master, a hydraulic pedal which moves the same distance as an original mechanical pedal will push just as hard (or soft) There isn't some magic boost, there. You will likely gain "a little" from lack of friction in the mechanical parts

As you make either the slave larger or the master smaller in diameter, the pedal effort becomes easier, but you lose stroke as you do so