One-bid leagues make the committee's job difficult when the team that is clearly best during the season fails to win the conference tournament (like Miami (OH)) this year.
If you are clearly a one-bid league, the conference itself should decide who goes to the NCAA tournament. They could omit the conference tournament or they could play it but remove the 'automatic bid' idea from it. Or, in the event that the team that clearly dominated the regular season fails to win the conference tournament, they could have one more game (between the regular season champ and the conference tournament champ) to decide who gets the bid.
I'm not an Auburn fan by any stretch of the imagination, but I would bet on Auburn to beat Miami (OH) all day every day. When the A10 suddenly becomes a two-bid league because of the automatic bid, better teams that battled a gauntlet of tough games in good conferences have to get left out of the NCAA tournament, which is a shame.