that's exactly what strength and window settings are for, Bruno. All the feel of your off the beat playing stays untouched and you quantise only those errors that are so far off the beat they stand out obviously as an error, but not necessarily exactly back to the beat, only closer than originally, as described in my first answer, the feel then is preserved even for the few quantised notes.

The subject then changed to score printing, and the hard quantise is only to facilitate a clean music print out. If you did not hard quantise and cut out the controllers on the score conversion, the print out would be all but useless with tied 64th notes all over the place etc.