RWarehall: The normal NCAA tourney pool is a bit of a lottery. They usually double the points for each round, so the final game is worth 32 points vs the first round games worth 1 each. So someone could pick very poorly, but pick a Cinderella and win the whole thing at the end because that one game is worth the same as all of round 1.
When we played this with friends last few tournaments (Euro and world cups), we'd multiply the elimination rounds scores by a factor of 1.5 compared to groups. The reasoning being that with stronger teams left, it's more difficult to predict results (e.g. it's easier to predict the winner in a Brazil vs China game than Brazil vs Germany).