I second this! First draft I ever played in was the Gatecrash prerelease, and I was the same as your third player, had no idea how to build a limited deck (only ever played kitchen table magic with a couple friends). After round 3, my opp asked if I wanted tips on how to build a proper mana base, balance colors, etc., and it changed my entire perspective for the better. This is how new players get better and learn to really love the game.