I'm from the party that says, "If it ain't broke, don't fix it." At least not yet. I don't doubt that HanRam's season numbers make him a minus defender but it's worth remembering that this is a new position for him and his defense has improved greatly since April. In addition, he's "engaged" at 1B and likes it there.
If he were failing at 1B I'd say, sure, make a change, but moving him to DH sounds to me like dickin' with something for the sake of dickin' with it.