No, simply dumping them off on another world is no solution either. If the commander's observations about the stars that vanish has any merit, it may already be too late for that.

[that's strange, though. He had already been thinking the same thing - that the spirits are former residents - but if they were here before the darkness? A lot isn't adding up yet.]

And there was never any indication of what any of them wanted? Spirits or World Eaters. No attempt to communicate, no means of learning their part in this puzzle prior to the end of the light and the decimation of the population...