Pedal Effort.
All things being equal, as a clutch disc gets thinner (normal wear) the release load increases as the disc approaches its normal wornout thickness. If you could put just a new disc under the same clutch cover and not change anything else, the release load should go down, be easier to push. Now, that being said the entire release system pedal cluster, master cylinder, pressure line, slave cylinder, fork, ball stud, guide tube (transmission bearing retainer) and release bearing are all involved and need a careful inspection and cleanup when any clutch job is performed and in particular when a problem is noted.