OP - it has been discussed here before however most Mustang threads get jammed into a mega thread which makes it almost impossible to do an effective keyword search....
Bottom line on this:
Ford had some issues with the stock clutches within a certain build date where pressure plate bolts were backing out. This caused the dowel pins used for clutch alignment to sheer off and preventing proper clutch disengagement. Symptoms included the clutch pedal staying on the floor after a shift attempt. Owners reported difficulty in shifting which resulted in damaged syncro's and/or gears. Ford issued several TSB's that cover the pressure plate bolts, cold shifting notchiness, and clutch pedal sticking.
The NTSB investigation reports 32 complaints. That is out of thousands of MT-82 owners.
I have personally never had an issue with mine or the stock clutch while it was in the car. In fact, it is the best shifting manual trans car I have owned/driven.
FYI - yes the MT-82 has a skip shift "feature" that can be disabled by unplugging the solenoid or via a tune.