Dota 2 International 2016 bracket system
Great site, with great tournament options so far!
However the system I like best and think is one of the fairest is the Dota 2 International 2016 system:
First a group stage, where each player battles each player in a group for a ranking. (this is already implemented here, also an option to show only wins and losses would be nice, ties are split). After that group stage it goes on to a double elimination stage, but the top half goes to the winner bracket, and the bottom half goes to the Looser bracket. (This is not yet possible here). Also add a tiebreaker game in case 2 or more players have the same score and are equally good, but 1 is in in the winnerbracket rankwise, and the other one isn't.