how have you been doing the bleeding of the clutch hydraulics? this has a lot to do with it
also, with a clutch change it is sometimes the clutch. Some clutches seem to take a lot less effort when pressing the pedal while others take a lot more. The is a definite difference between the exedy clutch I just installed into the gold car and the centerforce i installed into my yellow car.
i would start with looking at the slave for its movement and ensure that it is extending completely and staying extended. If not to either of these things I would then take it apart, clean it out, put it back together and bleed it out once more