My SE-R did the same thing after installing a JWT pressure plate. Both the mechanic and I were pretty surprised at how light the pedal pressure was the first time we stepped on it. I read that the JWT pp is based on a stock pp but with a different pivot point for the fingers. Like moving the fulcrum point on a see-saw. Rest assured, it is grabbing better than stock. The ACT street setup would've cost me less than the JWT PP/B15 SE disc but the light pedal pressure was well worth the extra cost (also I have no need for 200ft/lb of torque handling).
My clutch cable also had to be adjusted as the clutch grabbed closer to the floor. I am actually at the end of the cables adjustment and it grabs maybe 2 inches from the floor. But I had it that way even before the pp upgrade so it was fine with me. Again, its the different pivot point causing this.