Not really; riak is composed entirely of nodes that are more or less identical. Losing your cerebellum would be like losing a component on every one of your nodes because you only have one cerebellum.
Losing the cerebellum would be like losing a DC for which you have no backup, which then would require you to attempt to duplicate the original functionality in other DCs.
Losing the cerebellum would be like losing a DC for which you have no backup, which then would require you to attempt to duplicate the original functionality in other DCs.