As he began to speak more and more the way they spoke, he became more and more pliable to their every need. A simple symbol, yes, but simple symbols are the ones most easily understood. It was in very many ways equivalent to cult indoctrination, as they gave Chakotay clothes for him to wear, provided him with nourishment, offered emotional support, and gave him a vernacular to speak. Yes, Biller may have used a thesaurus one time too many, but the thought behind using that thesaurus more than makes up for it. Best of all, however, was the ending.
Nothing beats a touch of sudden ambiguity to end an episode with.
Trek too often wraps things up nice and tidy in the end, but here they could get away with it, and they chose to do so. First, they made it unclear as to who was guilty in the war. Finger pointing would have only created an extra plot complication. Leaving the issue up in the air points out that there may not be a correct answer after all. We left Chakotay, too, with a bit of ambiguity.