a first round home game, and BYU is ranked 25 in RPI today. they don't go 100% on RPI alone, but its certainly a sign that they are very much in the mix for top 32 and 1 first round home game.
Volleyball does home field differently where it starts with 16 quadrants. Volleyball is comfortably outside of the top 16 with not much chance to get in there.
NCAA does the Soccer differently where they don't send the 4 teams to one quadrant until after the first round when the field is narrowed to 32 teams.