The Arbitrators might wish to remember that Arbitration is not a court, and that unlike a court, it is not obligated to reach a decision. In the case of "Allegations of Apartheid" for example, the Committee could issue a statement to the effect that the Committee recognizes the community's concern that the other Allegations articles were created and defended to make a point, but that it is divided on whether any remedy is needed, and remands the issue to the community for discussion.
I don't think is constitutes failure to acknowledge that the Comittee is as divided as the general community on some issues; in those cases the Committee should confine its role to slapping down editors whose behavior is so outrageous that it interferes with the community's ability to calmly discuss the issue.
The community can only really take action if there is a consensus. If a matter has reached ArbCom, then it's usually pretty safe to say there isn't a consensus. If ArbCom don't do anything about it, then nothing will get done.