Okay, so initially I was brooding about how nothing matters now that Ianto's dead, and complaining that Torchwood is DEAD TO ME now, but then I totally had a revelation.
Children of Earth is totally a Christian allegory. STEPHEN CARTER DIED FOR YOUR SINS, Y'ALL.
For Captain Jack so loved the world that he gave his only grandson; that whoever believes in him ("him" in this case being Jack and his sexy man-brows) shall probably perish eventually, but at least will not have eternal life as an alien drug or a sufferer of immortal man-pain.
There! Sorted.
If you didn't love every moment of CoE, it probably means you're a heathen, and you're going to hell. HEATHENS.