large enough to include all contenders, which 4 teams is not.
I also don't believe that 1-and-done tourneys always find the best team. It's certainly an accomplishment for any team to navigate a 6 round 64 team tournament, but it doesn't allow for the fact that sometimes great teams have off nights and sometimes mediocre teams play out of their minds for a game or two.
Simply making it double elimination would go a long way to ensuring that the tourney was actually trying to find the best team and not just crown a tournament champion.