Ensapa, thanks for the topic. It is very profound.
I take it that when it is said that "There are only eyes and hands", it means that the mode of beings are from the aggregates only. It is from the aggregates that beings operate. From this example, the eye and hands are representative of the senses of the form. From the senses it leads the aggregate of feelings, perceptions and a complex interplay with mental afflictions and conscious and from these arises cravings and grasping ie attachments, the root of samsara. This form of Guanyin is a reflections of ourselves and at the same time the hands and eye being large in numbers; gives us the feelings of power and protection from our side.