I've known some associations that do this with a lot of positive results. The biggest downfall seems to be complacency. Seeing only one other official work is not good for your own personal growth. After working half the season with the same person, how are pregames gonna be affected in the second half? You've worked with this person for a while now, then they screw something up. Can you tell them? Will it affect the "partnership"?
I've never been in an association that uses partners, but these are just a few of the drawbacks I've heard about.
good luck with your decision