Just for grins, I compared the MAC's divisions via the final RPI rating(s).  Of course, OU plays in the East.  Toledo, last in the West, had a better RPI than 5 of the East division teams.

East:
Ohio no. 51
BGSU no. 135
Miami no. 140
Buffalo no. 213
Kent St. no. 214
Akron no. 230

West:
Northern Illinois no. 14
Western Mich no. 32
Ball St no. 34
Eastern Mich no. 68
Central Mich no. 74
Toledo no. 127

Of note, the Bobcats were 10-0 vs. MAC East teams (hard to improve on) and 3-3 vs. MAC West teams.  OU beat Eastern, Central and Toldeo -- while losing to Ball St, Northern and Western.  In fact, OU was 14-4 in MAC play -- with 4 losses (one each) to the 4 NCAA tournament teams.  One could argue the Bobcats might have earned a split with one or more of the MAC West teams if given an opportunity to play each at home;  with an obvious positive bump in their RPI number.

Given the fact that the MAC Tourney seeds (1-8) are based on overall MAC record now (vs. by division), it might make sense for the MAC to do a better job of blending the entire league -- vs. splitting the teams by division.  Clearly, OU's RPI was hurt by the level of play in the East ... and it likely cost them a spot in the national tournament. 

Something to think about as MAC volleyball continues to climb the ladder nationally.