Some tournaments require 4,5 rating average, then its a blast if average that you should give is a 3 star.
Like this tournament.viewtopic.php?t=183299
Since i saw what ratings Edric Wolfswift gives out he went straight to the foe list. seems he play with only bad players that he gives very bad ratings.
I think it should be a 5 star, and if something bother you about the play or the player you should go down in rating.