I SOOO want to see an achievement for Most Map discovered/uncovered/reveled based on the Cloud of war or Fog of war data

one of the I enjoyed in v1 was running around at lvl 10 trying to get past lvl 20's - just to go to new areas that I haven't been before.

I think that would be a cool achievement. (in Percentages 5%,10%,25%,30%~ of a given area.)