I'm one that happens to like puzzles which puts me in a bit of a minority, but at the same time I think it gives a unique perspective to things (the game, software, etc.). I'm also a bit old school as I was around long before geocaching.com added this functionality.
1) When generating a shared PQ / List of caches to send to others I don't always want the corrected coords included. By letting the main site store just the defaults I can generate data from there without worrying about accidently sharing the final coordinates.
2) Keeping them separate allows me to keep all my extensive notes (i.e. more that what I can on the default site) along with the corrected coords in a single spot.
3) When doing geoart series of puzzles it's nice to see the geoart vs. the random pattern of the actual coords.
I'm trying to become a convert to Cachly, but honestly this and 2 other features of Geosphere that I used extensively are holding me back a bit.
CJ