When I replaced my clutch for the first time the pedal was very light for the first 100-200 miles or so then it firmed up.
2016 WRX STi Limited (current)2001 A4 1.8tqms (donated)1991 GVR4 #1933 (sold)old.dsmregistry.com/detail.php?carid=218 (dismantled)