This would be great help for analysing or developing new patches starting with stored patches AND for live performance, if we change parameters and wish to go back to the stored value after a while ...
Simple option: There could be a display (LED, or something in the parameter display), which goes on/off, if we change any parameter and match with the stored parameter.
Great option: If we change any parameter the display shows the actual value vs the stored value.
(I have got this on some other synths and it's very useful)