And the end just felt like Tom saying "okay, I'm tired of this invasion, let's stop it with a happy ending".
Nobody really understood what the hell was going on, and then all of a sudden, no more invaders. "And there was much rejoicing".
Yes, it did rather feel like that. The Archons just appeared out of the blue one day and everything ended quite quickly thereafter, but there was never any reason given for their appearance. I'm sure there *is* one, but I suspect that virtually no one actually knows what it is. It was fairly anti-climactic.
