"...even if in a worse case scenario ALL of Greenalnd melts, MUCH of that fresh water will stay put in some GI-NORmous "Great Lakes"."


Wrong, wrong, wrong. Go do a bit of reading on isostasy and post-glacial rebound. The lithosphere is quite elastic. If all of the ice melts, first, there will be a giant depression into which the sea will flow, then Greenland will not only pop back up, it will overshoot and develop a nice hump. Ain't gonna be no ginormous lakes there.